three.js/src/audio/PositionalAudio.d.ts

import { AudioListener } from './AudioListener';
import { Audio } from './Audio';

export class AudioBuffer {
  constructor(context: any);

  context: any;
  ready: boolean;
  readyCallbacks: Function[];

  load(file: string): AudioBuffer;
  onReady(callback: Function): void;
}

export class PositionalAudio extends Audio {
  constructor(listener: AudioListener);

  panner: PannerNode;

  setRefDistance(value: number): this;
  getRefDistance(): number;
  setRolloffFactor(value: number): this;
  getRolloffFactor(): number;
  setDistanceModel(value: string): this;
  getDistanceModel(): string;
  setMaxDistance(value: number): this;
  getMaxDistance(): number;
  setDirectionalCone(coneInnerAngle: number, coneOuterAngle: number, coneOuterGain: number): this;
}