feat: add physically explicit narrowband MUSIC

packages/acoustics-core/index.js

@@ -5,11 +5,14 @@ export * from "./fft.js";
 export * from "./frequency-response.js";
 export * from "./fractional-delay.js";
 export * from "./gcc-phat.js";
+export * from "./hermitian-eigen.js";
 export * from "./localization.js";
 export * from "./localization-algorithms.js";
 export * from "./math.js";
 export * from "./mixdown.js";
+export * from "./music.js";
 export * from "./noise.js";
+export * from "./covariance.js";
 export * from "./propagation.js";
 export * from "./realtime-localizer.js";
 export * from "./signal.js";