/// <reference types="node" />
import { TranscriberPlugin, TranscriptionEvents, TypedEmitter } from "ivr-tester";
import internal from "stream";
export declare class GoogleSpeechToText extends TypedEmitter<TranscriptionEvents> implements TranscriberPlugin {
    private readonly speechClient;
    private static readonly debug;
    private static createConfig;
    private readonly config;
    private stream;
    constructor(languageCode: string, speechPhrases?: string[], useEnhanced?: boolean, speechClient?: import("@google-cloud/speech/build/src/v1").SpeechClient);
    transcribe(payload: Buffer): void;
    close(): void;
    private createStream;
    getStream(): internal.Writable;
    transcriptionComplete(): void;
}