import { CallQualityWarningEventType } from "../CallQualityWarningEventType";
import { CallQualityWarningEvent } from "./CallQualityWarningEvent";
/**
 * Warning issued when the audio level measurements of the outbound rtp audio stream from
 * last 2 seconds are equal to 0.
 *
 * @param type - `Trigger` when the warning is emitted, `Recover` when the warning is recovered.
 */
export declare class ZeroOutboundAudioLevelWarningEvent implements CallQualityWarningEvent {
    readonly type: CallQualityWarningEventType;
    constructor(type: CallQualityWarningEventType);
    readonly name: string;
}