export declare function getCurrentVolume(analyser: AnalyserNode): number;
export declare const isSpeaking: (analyser: AnalyserNode, threshold: number) => boolean;
/**
 * Loudness as dBFS, from the same RMS the speaking check uses. Byte time-domain samples are
 * centred on 128, so the result is 0 or below and silence is -Infinity — clamp it.
 */
export declare function getVolumeDb(analyser: AnalyserNode): number;
/** Quietest level the ring reacts to. Below this it sits at rest. */
export declare const VOLUME_FLOOR_DB = -55;
/** Where the ring reaches full size. Normal speech sits a little under this. */
export declare const VOLUME_CEIL_DB = -12;
/**
 * dBFS to a 0–1 ring size. Linear in dB rather than amplitude, which spends its range on
 * sounds too quiet to see and then saturates.
 */
export declare function volumeToLevel(db: number): number;