diff --git a/apps/acoustic-camera/index.html b/apps/acoustic-camera/index.html
index cd61735..161eb67 100644
--- a/apps/acoustic-camera/index.html
+++ b/apps/acoustic-camera/index.html
@@ -59,7 +59,7 @@
 
           <section class="history-section">
             <div class="section-heading"><div><p class="eyebrow">Same-scene comparison</p><h2>배열 비교 기록</h2></div><button class="text-button" id="clear-history-button" type="button">기록 비우기</button></div>
-            <p class="section-copy">Array JSON을 바꿔 다시 실행하면 같은 scene의 결과를 이 세션에서 나란히 비교합니다.</p>
+            <p class="section-copy">비교 배열 또는 Array JSON을 바꿔 다시 실행하면 같은 scene·scan·STFT 결과를 이 세션에서 나란히 비교합니다.</p>
             <div class="history-list" id="history-list"></div>
           </section>
         </section>
@@ -67,6 +67,7 @@
         <aside class="control-panel" aria-label="Simulation parameters">
           <section class="array-card">
             <div class="array-heading"><div><p class="eyebrow">Microphone geometry</p><h2 id="array-title">배열</h2></div><strong id="microphone-count">— ch</strong></div>
+            <label class="array-preset-field"><span>비교 배열</span><select id="array-preset"><option value="rectangular-16x12">16×12 rectangular · 기준</option><option value="fermat-spiral-192">Fermat spiral · 비교</option><option value="custom">불러온 Array JSON</option></select></label>
             <canvas id="array-canvas" aria-label="마이크 배열 평면도"></canvas>
             <p id="array-meta">배열을 불러오고 있습니다.</p>
           </section>
diff --git a/apps/acoustic-camera/main.js b/apps/acoustic-camera/main.js
index be4cf43..47eb33a 100644
--- a/apps/acoustic-camera/main.js
+++ b/apps/acoustic-camera/main.js
@@ -23,6 +23,10 @@ const DEFAULT_DOCUMENT_URLS = {
   scene: "/assets/sample-scenes/single-tone.scene.json",
   experiment: "/assets/sample-scenes/single-tone.experiment.json",
 };
+const ARRAY_PRESET_URLS = new Map([
+  ["rectangular-16x12", "/assets/array-geometries/rectangular-16x12.array.json"],
+  ["fermat-spiral-192", "/assets/array-geometries/fermat-spiral-192.array.json"],
+]);
 const BAND_COLORS = ["#65f2bf", "#58c7ff", "#ff7f8f", "#ffc56e", "#b294ff", "#8fe388", "#ff9ee5", "#83a8ff"];
 const MAX_HISTORY_ITEMS = 24;
 
@@ -51,6 +55,7 @@ const elements = {
   historyList: byId("history-list"),
   arrayTitle: byId("array-title"),
   microphoneCount: byId("microphone-count"),
+  arrayPreset: byId("array-preset"),
   arrayCanvas: byId("array-canvas"),
   arrayMeta: byId("array-meta"),
   sourceSummary: byId("source-summary"),
@@ -223,6 +228,9 @@ function syncControls() {
   elements.hopSize.value = experiment.stft.hopSize;
   elements.normalization.value = experiment.beamforming.normalization;
   elements.dynamicRange.value = experiment.beamforming.dynamicRangeDb;
+  elements.arrayPreset.value = ARRAY_PRESET_URLS.has(state.arrayDefinition.id)
+    ? state.arrayDefinition.id
+    : "custom";
   elements.gridPreset.value =
     experiment.scan.columns === experiment.scan.rows && [50, 100, 200].includes(experiment.scan.rows)
       ? String(experiment.scan.rows)
@@ -855,6 +863,34 @@ async function loadJson(url) {
   return response.json();
 }
 
+async function loadArrayPreset(presetId) {
+  const url = ARRAY_PRESET_URLS.get(presetId);
+  if (!url) {
+    elements.arrayInput.click();
+    syncControls();
+    return;
+  }
+  const generation = ++state.importGenerations.array;
+  beginInputOperation();
+  try {
+    setRunStatus(`${presetId} 비교 배열을 불러오고 있습니다…`);
+    const value = await loadJson(url);
+    if (generation !== state.importGenerations.array) return;
+    const issues = await validateArrayDefinition(value);
+    if (generation !== state.importGenerations.array) return;
+    if (issues.length > 0) throw new Error(issues.slice(0, 4).map(formatIssue).join(" · "));
+    state.arrayDefinition = value;
+    state.experiment.arrayId = value.id;
+    markChanged({ syncControls: true });
+    setRunStatus(`${value.name} 배열을 선택했습니다. 실행하면 같은 설정 기록에 추가됩니다.`);
+  } catch (error) {
+    syncControls();
+    setTransientError(error, "비교 배열 불러오기 실패");
+  } finally {
+    endInputOperation();
+  }
+}
+
 async function importDocument(kind, input) {
   const file = input.files?.[0];
   input.value = "";
@@ -1039,6 +1075,7 @@ function installActionListeners() {
     "change",
     () => importDocument("experiment", elements.experimentInput),
   );
+  elements.arrayPreset.addEventListener("change", () => loadArrayPreset(elements.arrayPreset.value));
   elements.assetInput.addEventListener("change", async () => {
     const files = [...(elements.assetInput.files ?? [])];
     elements.assetInput.value = "";
diff --git a/apps/acoustic-camera/styles.css b/apps/acoustic-camera/styles.css
index a21b0d6..f4a8241 100644
--- a/apps/acoustic-camera/styles.css
+++ b/apps/acoustic-camera/styles.css
@@ -55,6 +55,10 @@
 .array-heading { align-items: flex-start; }
 .array-heading h2 { margin: 0; font-size: .95rem; }
 .array-heading > strong { color: var(--mint); font: 750 .78rem ui-monospace, SFMono-Regular, Consolas, monospace; }
+.array-preset-field { display: grid; gap: 6px; margin-top: 12px; }
+.array-preset-field span { color: var(--muted); font-size: .66rem; font-weight: 650; }
+.array-preset-field select { width: 100%; min-height: 37px; padding: 8px 9px; border: 1px solid var(--line); border-radius: 9px; color: var(--text); background: #0b1714; }
+.array-preset-field select:focus { border-color: var(--mint); outline: 2px solid rgb(101 242 191 / 11%); }
 #array-canvas { display: block; width: 100%; height: 265px; margin-top: 10px; border: 1px solid var(--line); border-radius: 12px; background: #07110f; }
 #array-meta { margin: 9px 0 0; color: var(--muted); font: 600 .66rem ui-monospace, SFMono-Regular, Consolas, monospace; }
 .section-title { display: flex; align-items: center; gap: 9px; margin-bottom: 13px; }
diff --git a/assets/array-geometries/fermat-spiral-192.array.json b/assets/array-geometries/fermat-spiral-192.array.json
new file mode 100644
index 0000000..76ba1e5
--- /dev/null
+++ b/assets/array-geometries/fermat-spiral-192.array.json
@@ -0,0 +1,1556 @@
+{
+    "schemaVersion":  "1.0.0",
+    "kind":  "micarrsim.array",
+    "id":  "fermat-spiral-192",
+    "name":  "192-channel Fermat spiral",
+    "description":  "Equal-area Fermat spiral on a 0.45 m circular aperture for comparison with the rectangular baseline",
+    "units":  "m",
+    "coordinateSystem":  {
+                             "handedness":  "right",
+                             "xAxis":  "right",
+                             "yAxis":  "up",
+                             "zAxis":  "toward-scene"
+                         },
+    "aperture":  {
+                     "width":  0.45,
+                     "height":  0.45
+                 },
+    "microphones":  [
+                        {
+                            "id":  "mic-001",
+                            "position":  [
+                                             0.011482,
+                                             0,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-002",
+                            "position":  [
+                                             -0.014664,
+                                             0.013434,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-003",
+                            "position":  [
+                                             0.002245,
+                                             -0.025576,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-004",
+                            "position":  [
+                                             0.018483,
+                                             0.024108,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-005",
+                            "position":  [
+                                             -0.033919,
+                                             -0.006,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-006",
+                            "position":  [
+                                             0.032131,
+                                             -0.020439,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-007",
+                            "position":  [
+                                             -0.010747,
+                                             0.03998,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-008",
+                            "position":  [
+                                             -0.020496,
+                                             -0.039464,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-009",
+                            "position":  [
+                                             0.044469,
+                                             0.01624,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-010",
+                            "position":  [
+                                             -0.046262,
+                                             0.019096,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-011",
+                            "position":  [
+                                             0.022302,
+                                             -0.047657,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-012",
+                            "position":  [
+                                             0.01648,
+                                             0.052542,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-013",
+                            "position":  [
+                                             -0.049672,
+                                             -0.028786,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-014",
+                            "position":  [
+                                             0.058271,
+                                             -0.012811,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-015",
+                            "position":  [
+                                             -0.035562,
+                                             0.050583,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-016",
+                            "position":  [
+                                             -0.008216,
+                                             -0.063399,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-017",
+                            "position":  [
+                                             0.050435,
+                                             0.042507,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-018",
+                            "position":  [
+                                             -0.06787,
+                                             0.002807,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-019",
+                            "position":  [
+                                             0.049506,
+                                             -0.049265,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-020",
+                            "position":  [
+                                             -0.003312,
+                                             0.071628,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-021",
+                            "position":  [
+                                             -0.047105,
+                                             -0.056448,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-022",
+                            "position":  [
+                                             0.07462,
+                                             0.01004,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-023",
+                            "position":  [
+                                             -0.063225,
+                                             0.043991,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-024",
+                            "position":  [
+                                             0.017277,
+                                             -0.076797,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-025",
+                            "position":  [
+                                             0.03996,
+                                             0.069736,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-026",
+                            "position":  [
+                                             -0.078119,
+                                             -0.024922,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-027",
+                            "position":  [
+                                             0.075882,
+                                             -0.03506,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-028",
+                            "position":  [
+                                             -0.032874,
+                                             0.078551,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-029",
+                            "position":  [
+                                             -0.029339,
+                                             -0.081571,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-030",
+                            "position":  [
+                                             0.078069,
+                                             0.041031,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-031",
+                            "position":  [
+                                             -0.086715,
+                                             0.022858,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-032",
+                            "position":  [
+                                             0.049289,
+                                             -0.076656,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-033",
+                            "position":  [
+                                             0.015679,
+                                             0.091233,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-034",
+                            "position":  [
+                                             -0.074306,
+                                             -0.057547,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-035",
+                            "position":  [
+                                             0.095051,
+                                             -0.007875,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-036",
+                            "position":  [
+                                             -0.0657,
+                                             0.07102,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-037",
+                            "position":  [
+                                             0.000479,
+                                             -0.098101,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-038",
+                            "position":  [
+                                             0.06681,
+                                             0.073648,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-039",
+                            "position":  [
+                                             -0.100324,
+                                             -0.009298,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-040",
+                            "position":  [
+                                             0.081292,
+                                             -0.061698,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-041",
+                            "position":  [
+                                             -0.018496,
+                                             0.101669,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-042",
+                            "position":  [
+                                             -0.055714,
+                                             -0.088535,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-043",
+                            "position":  [
+                                             0.102094,
+                                             0.02798,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-044",
+                            "position":  [
+                                             -0.095283,
+                                             0.048897,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-045",
+                            "position":  [
+                                             0.037654,
+                                             -0.101566,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-046",
+                            "position":  [
+                                             0.041298,
+                                             0.101447,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-047",
+                            "position":  [
+                                             -0.10006,
+                                             -0.04742,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-048",
+                            "position":  [
+                                             0.106945,
+                                             -0.032972,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-049",
+                            "position":  [
+                                             -0.057178,
+                                             0.097564,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-050",
+                            "position":  [
+                                             -0.023986,
+                                             -0.111698,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-051",
+                            "position":  [
+                                             0.094073,
+                                             0.066825,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-052",
+                            "position":  [
+                                             -0.115635,
+                                             0.014411,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-053",
+                            "position":  [
+                                             0.076261,
+                                             -0.089594,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-054",
+                            "position":  [
+                                             0.004328,
+                                             0.118692,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-055",
+                            "position":  [
+                                             -0.084142,
+                                             -0.085383,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-056",
+                            "position":  [
+                                             0.120812,
+                                             0.006177,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-057",
+                            "position":  [
+                                             -0.094092,
+                                             0.077744,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-058",
+                            "position":  [
+                                             0.017014,
+                                             -0.121949,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-059",
+                            "position":  [
+                                             0.070434,
+                                             0.102293,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-060",
+                            "position":  [
+                                             -0.122064,
+                                             -0.028087,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-061",
+                            "position":  [
+                                             0.10989,
+                                             -0.06226,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-062",
+                            "position":  [
+                                             -0.039295,
+                                             0.121127,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-063",
+                            "position":  [
+                                             -0.053273,
+                                             -0.116797,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-064",
+                            "position":  [
+                                             0.119119,
+                                             0.050536,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-065",
+                            "position":  [
+                                             -0.122928,
+                                             0.043538,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-066",
+                            "position":  [
+                                             0.061706,
+                                             -0.11603,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-067",
+                            "position":  [
+                                             0.033127,
+                                             0.128206,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-068",
+                            "position":  [
+                                             -0.11186,
+                                             -0.072699,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-069",
+                            "position":  [
+                                             0.132561,
+                                             -0.022117,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-070",
+                            "position":  [
+                                             -0.083409,
+                                             0.106621,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-071",
+                            "position":  [
+                                             -0.010594,
+                                             -0.135929,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-072",
+                            "position":  [
+                                             0.100334,
+                                             0.093731,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-073",
+                            "position":  [
+                                             -0.138255,
+                                             -0.001349,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-074",
+                            "position":  [
+                                             0.103563,
+                                             -0.09303,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-075",
+                            "position":  [
+                                             -0.013615,
+                                             0.139493,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-076",
+                            "position":  [
+                                             -0.08475,
+                                             -0.112804,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-077",
+                            "position":  [
+                                             0.139605,
+                                             0.026101,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-078",
+                            "position":  [
+                                             -0.121357,
+                                             0.075545,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-079",
+                            "position":  [
+                                             0.038703,
+                                             -0.138565,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-080",
+                            "position":  [
+                                             0.065474,
+                                             0.129132,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-081",
+                            "position":  [
+                                             -0.136356,
+                                             -0.05131,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-082",
+                            "position":  [
+                                             0.136041,
+                                             -0.054608,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-083",
+                            "position":  [
+                                             -0.063813,
+                                             0.132969,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-084",
+                            "position":  [
+                                             -0.043024,
+                                             -0.142005,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-085",
+                            "position":  [
+                                             0.12841,
+                                             0.076099,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-086",
+                            "position":  [
+                                             -0.146952,
+                                             0.030807,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-087",
+                            "position":  [
+                                             0.088058,
+                                             -0.122692,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-088",
+                            "position":  [
+                                             0.018049,
+                                             0.150816,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-089",
+                            "position":  [
+                                             -0.11584,
+                                             -0.099579,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-090",
+                            "position":  [
+                                             0.153542,
+                                             -0.004849,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-091",
+                            "position":  [
+                                             -0.110554,
+                                             0.10789,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-092",
+                            "position":  [
+                                             0.008688,
+                                             -0.155082,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-093",
+                            "position":  [
+                                             0.098886,
+                                             0.120877,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-094",
+                            "position":  [
+                                             -0.1554,
+                                             -0.022455,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-095",
+                            "position":  [
+                                             0.130447,
+                                             -0.088885,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-096",
+                            "position":  [
+                                             -0.036337,
+                                             0.154468,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-097",
+                            "position":  [
+                                             -0.077953,
+                                             -0.139168,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-098",
+                            "position":  [
+                                             0.152269,
+                                             0.05022,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-099",
+                            "position":  [
+                                             -0.14695,
+                                             0.066162,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-100",
+                            "position":  [
+                                             0.063986,
+                                             -0.148799,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-101",
+                            "position":  [
+                                             0.053598,
+                                             0.153708,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-102",
+                            "position":  [
+                                             -0.144061,
+                                             -0.077518,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-103",
+                            "position":  [
+                                             0.159368,
+                                             -0.04035,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-104",
+                            "position":  [
+                                             -0.090696,
+                                             0.138073,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-105",
+                            "position":  [
+                                             -0.026518,
+                                             -0.163861,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-106",
+                            "position":  [
+                                             0.130862,
+                                             0.103405,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-107",
+                            "position":  [
+                                             -0.167129,
+                                             0.012206,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-108",
+                            "position":  [
+                                             0.115529,
+                                             -0.122465,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-109",
+                            "position":  [
+                                             -0.002475,
+                                             0.169122,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-110",
+                            "position":  [
+                                             -0.112932,
+                                             -0.126958,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-111",
+                            "position":  [
+                                             0.169802,
+                                             0.01741,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-112",
+                            "position":  [
+                                             -0.137585,
+                                             0.102322,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-113",
+                            "position":  [
+                                             0.032478,
+                                             -0.16914,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-114",
+                            "position":  [
+                                             0.090704,
+                                             0.147307,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-115",
+                            "position":  [
+                                             -0.167119,
+                                             -0.047558,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-116",
+                            "position":  [
+                                             0.15603,
+                                             -0.078158,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-117",
+                            "position":  [
+                                             -0.062525,
+                                             0.163733,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-118",
+                            "position":  [
+                                             -0.064772,
+                                             -0.163665,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-119",
+                            "position":  [
+                                             0.158987,
+                                             0.077255,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-120",
+                            "position":  [
+                                             -0.17013,
+                                             0.050641,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-121",
+                            "position":  [
+                                             0.091622,
+                                             -0.152898,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-122",
+                            "position":  [
+                                             0.035869,
+                                             0.175355,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-123",
+                            "position":  [
+                                             -0.145495,
+                                             -0.105504,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-124",
+                            "position":  [
+                                             0.179277,
+                                             -0.020569,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-125",
+                            "position":  [
+                                             -0.118778,
+                                             0.136818,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-126",
+                            "position":  [
+                                             -0.004855,
+                                             -0.181844,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-127",
+                            "position":  [
+                                             0.126917,
+                                             0.131326,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-128",
+                            "position":  [
+                                             -0.183013,
+                                             -0.011149,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-129",
+                            "position":  [
+                                             0.143037,
+                                             -0.115855,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-130",
+                            "position":  [
+                                             -0.027318,
+                                             0.182755,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-131",
+                            "position":  [
+                                             -0.103704,
+                                             -0.153801,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-132",
+                            "position":  [
+                                             0.181049,
+                                             0.043523,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-133",
+                            "position":  [
+                                             -0.163517,
+                                             0.090546,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-134",
+                            "position":  [
+                                             0.059633,
+                                             -0.177888,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-135",
+                            "position":  [
+                                             0.076475,
+                                             0.172091,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-136",
+                            "position":  [
+                                             -0.173277,
+                                             -0.075516,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-137",
+                            "position":  [
+                                             0.179438,
+                                             -0.06159,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-138",
+                            "position":  [
+                                             -0.09104,
+                                             0.167232,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-139",
+                            "position":  [
+                                             -0.046,
+                                             -0.185479,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-140",
+                            "position":  [
+                                             0.159782,
+                                             0.106075,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-141",
+                            "position":  [
+                                             -0.190149,
+                                             0.029821,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-142",
+                            "position":  [
+                                             0.120493,
+                                             -0.150967,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-143",
+                            "position":  [
+                                             0.013176,
+                                             0.19339,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-144",
+                            "position":  [
+                                             -0.14084,
+                                             -0.134168,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-145",
+                            "position":  [
+                                             0.195157,
+                                             0.003809,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-146",
+                            "position":  [
+                                             -0.146981,
+                                             0.129464,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-147",
+                            "position":  [
+                                             0.021,
+                                             -0.195415,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-148",
+                            "position":  [
+                                             0.116913,
+                                             0.158817,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-149",
+                            "position":  [
+                                             -0.194142,
+                                             -0.038262,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-150",
+                            "position":  [
+                                             0.169568,
+                                             -0.103274,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-151",
+                            "position":  [
+                                             -0.055458,
+                                             0.19133,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-152",
+                            "position":  [
+                                             -0.088641,
+                                             -0.179134,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-153",
+                            "position":  [
+                                             0.186979,
+                                             0.07245,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-154",
+                            "position":  [
+                                             -0.187423,
+                                             0.073119,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-155",
+                            "position":  [
+                                             0.089098,
+                                             -0.181105,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-156",
+                            "position":  [
+                                             0.05682,
+                                             0.194351,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-157",
+                            "position":  [
+                                             -0.173736,
+                                             -0.105264,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-158",
+                            "position":  [
+                                             0.199848,
+                                             -0.039865,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-159",
+                            "position":  [
+                                             -0.120815,
+                                             0.164911,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-160",
+                            "position":  [
+                                             -0.022381,
+                                             -0.20385,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-161",
+                            "position":  [
+                                             0.154684,
+                                             0.135617,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-162",
+                            "position":  [
+                                             -0.206307,
+                                             0.004502,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-163",
+                            "position":  [
+                                             0.149545,
+                                             -0.143119,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-164",
+                            "position":  [
+                                             -0.013636,
+                                             0.207182,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-165",
+                            "position":  [
+                                             -0.130291,
+                                             -0.162475,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-166",
+                            "position":  [
+                                             0.206448,
+                                             0.03189,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-167",
+                            "position":  [
+                                             -0.174294,
+                                             0.116289,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-168",
+                            "position":  [
+                                             0.050117,
+                                             -0.204092,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-169",
+                            "position":  [
+                                             0.101208,
+                                             0.184894,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-170",
+                            "position":  [
+                                             -0.200113,
+                                             -0.068171,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-171",
+                            "position":  [
+                                             0.194176,
+                                             -0.085157,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-172",
+                            "position":  [
+                                             -0.085908,
+                                             0.194524,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-173",
+                            "position":  [
+                                             -0.068252,
+                                             -0.202052,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-174",
+                            "position":  [
+                                             0.187352,
+                                             0.103181,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-175",
+                            "position":  [
+                                             -0.208443,
+                                             0.050617,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-176",
+                            "position":  [
+                                             0.119851,
+                                             -0.178634,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-177",
+                            "position":  [
+                                             0.032384,
+                                             0.213282,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-178",
+                            "position":  [
+                                             -0.168424,
+                                             -0.135776,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-179",
+                            "position":  [
+                                             0.216513,
+                                             -0.01369,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-180",
+                            "position":  [
+                                             -0.150823,
+                                             0.156785,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-181",
+                            "position":  [
+                                             0.005321,
+                                             -0.218093,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-182",
+                            "position":  [
+                                             0.143793,
+                                             0.164864,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-183",
+                            "position":  [
+                                             -0.21799,
+                                             -0.024502,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-184",
+                            "position":  [
+                                             0.177775,
+                                             -0.129537,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-185",
+                            "position":  [
+                                             -0.043704,
+                                             0.216188,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-186",
+                            "position":  [
+                                             -0.114116,
+                                             -0.189443,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-187",
+                            "position":  [
+                                             0.212683,
+                                             0.062774,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-188",
+                            "position":  [
+                                             -0.199763,
+                                             0.097639,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-189",
+                            "position":  [
+                                             0.081562,
+                                             -0.207485,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-190",
+                            "position":  [
+                                             0.080225,
+                                             0.208638,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-191",
+                            "position":  [
+                                             -0.200615,
+                                             -0.099915,
+                                             0
+                                         ]
+                        },
+                        {
+                            "id":  "mic-192",
+                            "position":  [
+                                             0.215984,
+                                             -0.062002,
+                                             0
+                                         ]
+                        }
+                    ]
+}
diff --git a/scripts/generate-array-fixture.ps1 b/scripts/generate-array-fixture.ps1
index 23d3042..47a0740 100644
--- a/scripts/generate-array-fixture.ps1
+++ b/scripts/generate-array-fixture.ps1
@@ -39,3 +39,45 @@ $arrayDefinition = [ordered]@{
 $json = $arrayDefinition | ConvertTo-Json -Depth 8
 [System.IO.File]::WriteAllText($outputPath, $json + [Environment]::NewLine, [System.Text.UTF8Encoding]::new($false))
 Write-Host "Generated $($microphones.Count) microphones: $outputPath"
+
+$spiralOutputPath = Join-Path $projectRoot 'assets/array-geometries/fermat-spiral-192.array.json'
+$spiralMicrophones = [System.Collections.Generic.List[object]]::new()
+$microphoneCount = 192
+$radius = 0.225
+$goldenAngle = [Math]::PI * (3 - [Math]::Sqrt(5))
+
+for ($index = 0; $index -lt $microphoneCount; $index++) {
+    $microphoneRadius = $radius * [Math]::Sqrt(($index + 0.5) / $microphoneCount)
+    $angle = $index * $goldenAngle
+    $x = $microphoneRadius * [Math]::Cos($angle)
+    $y = $microphoneRadius * [Math]::Sin($angle)
+    $spiralMicrophones.Add([ordered]@{
+        id       = 'mic-{0:D3}' -f ($index + 1)
+        position = @([Math]::Round($x, 6), [Math]::Round($y, 6), 0)
+    })
+}
+
+$spiralDefinition = [ordered]@{
+    schemaVersion    = '1.0.0'
+    kind             = 'micarrsim.array'
+    id               = 'fermat-spiral-192'
+    name             = '192-channel Fermat spiral'
+    description      = 'Equal-area Fermat spiral on a 0.45 m circular aperture for comparison with the rectangular baseline'
+    units            = 'm'
+    coordinateSystem = [ordered]@{
+        handedness = 'right'
+        xAxis       = 'right'
+        yAxis       = 'up'
+        zAxis       = 'toward-scene'
+    }
+    aperture         = [ordered]@{ width = 0.45; height = 0.45 }
+    microphones      = $spiralMicrophones
+}
+
+$spiralJson = $spiralDefinition | ConvertTo-Json -Depth 8
+[System.IO.File]::WriteAllText(
+    $spiralOutputPath,
+    $spiralJson + [Environment]::NewLine,
+    [System.Text.UTF8Encoding]::new($false)
+)
+Write-Host "Generated $($spiralMicrophones.Count) microphones: $spiralOutputPath"
diff --git a/tests/integration/camera-ui.test.js b/tests/integration/camera-ui.test.js
index ac99182..971fb70 100644
--- a/tests/integration/camera-ui.test.js
+++ b/tests/integration/camera-ui.test.js
@@ -124,6 +124,17 @@ test("Acoustic Camera가 8×8 CPU 실행·결과 저장·stale·재실행 흐름
         !documentObject.querySelector("#run-button").disabled,
       "original comparison configuration restore",
     );
+    dispatchValue(
+      windowObject,
+      documentObject.querySelector("#array-preset"),
+      "fermat-spiral-192",
+    );
+    await waitFor(
+      () => documentObject.querySelector("#array-title").textContent.includes("Fermat") &&
+        documentObject.documentElement.dataset.cameraValid === "true" &&
+        !documentObject.querySelector("#run-button").disabled,
+      "Fermat comparison array",
+    );
 
     documentObject.querySelector("#run-button").click();
     await waitFor(
@@ -138,6 +149,9 @@ test("Acoustic Camera가 8×8 CPU 실행·결과 저장·stale·재실행 흐름
     );
     assert(!documentObject.querySelector("#result-badge").textContent.includes("이전 설정"), "fresh result badge");
     assertEqual(documentObject.querySelectorAll("#history-list .history-card").length, 2, "rerun history");
+    const historyText = documentObject.querySelector("#history-list").textContent;
+    assert(historyText.includes("rectangular baseline"), "baseline history retained");
+    assert(historyText.includes("Fermat spiral"), "comparison array history added");
   } finally {
     windowObject.HTMLAnchorElement.prototype.click = originalAnchorClick;
     windowObject.URL.revokeObjectURL = originalRevoke;
diff --git a/tests/unit/contracts.test.js b/tests/unit/contracts.test.js
index 791cf8d..1005f02 100644
--- a/tests/unit/contracts.test.js
+++ b/tests/unit/contracts.test.js
@@ -18,6 +18,21 @@ test("192채널 기준 배열이 계약을 통과한다", async () => {
   assertEqual((await validateArrayDefinition(arrayDefinition)).length, 0, "array issues");
 });
 
+test("192채널 Fermat spiral 비교 배열이 계약과 원형 aperture를 만족한다", async () => {
+  const arrayDefinition = await loadJson("/assets/array-geometries/fermat-spiral-192.array.json");
+  assertEqual(arrayDefinition.microphones.length, 192, "spiral microphone count");
+  assertEqual((await validateArrayDefinition(arrayDefinition)).length, 0, "spiral array issues");
+  const maximumRadius = Math.max(
+    ...arrayDefinition.microphones.map(({ position }) => Math.hypot(position[0], position[1])),
+  );
+  assert(maximumRadius <= 0.225001, `spiral aperture radius: ${maximumRadius}`);
+  assertEqual(
+    new Set(arrayDefinition.microphones.map(({ position }) => position.join(","))).size,
+    192,
+    "spiral positions are unique",
+  );
+});
+
 test("단일 tone 장면과 실험이 관계 검증을 통과한다", async () => {
   const [arrayDefinition, scene, experiment] = await Promise.all([
     loadJson("/assets/array-geometries/rectangular-16x12.array.json"),