import { CallQualityWarningEventType } from "../CallQualityWarningEventType";
import { CallQualityWarningEvent } from "./CallQualityWarningEvent";
/**
 * Warning issued when standard deviation of audio level measurements of the outbound stream
 * from last 20 seconds is lower then 0.5% of the maximum possible audio level value.
 *
 * @param type - `Trigger` when the warning is emitted, `Recover` when the warning is recovered.
 */
export declare class ConstantOutboundAudioLevelWarningEvent implements CallQualityWarningEvent {
    readonly type: CallQualityWarningEventType;
    constructor(type: CallQualityWarningEventType);
    readonly name: string;
}