export declare const DEFAULT_TEST_AUDIO_INTERVAL: number;
export declare const DEFAULT_UNIQUE_DEVICE_ID = "unknown-deviceId";
export declare const DEFAULT_MICROPHONE_DEVICE_TAG = "unknown-device-tag";
export declare const DEFAULT_MOBILE_CAMERA_SOURCE_ID = "default-mobile-camera-source-id";
export declare const DEFAULT_MOBILE_MIC_SOURCE_ID = "default-mobile-mic-source-id";