export type VolumeLevel = {
    real: number;
    smoothed: number;
};
export declare class VolumeDetector {
    private _analyser;
    private _gainNode;
    private _fftBins;
    private _mediaStreamSource;
    private _lastSmoothedLevel;
    private readonly _trackId;
    private readonly _track;
    private readonly _stream;
    constructor(id: string, track: MediaStreamTrack);
    get track(): MediaStreamTrack;
    get trackId(): string;
    private _getBins;
    getLevel(): VolumeLevel;
    destroy(): void;
}