import { CognigyClient } from "./cognigyClient/index";
import { ISpeechOptions } from "./interfaces/speechOptions";
/**
 * Class that extends the cognigy clients functionalities. Allows to use the
 * browsers build-in html5-apis to record audio and create transcripts of voice
 * streams.
 */
export declare class CognigyWebClient extends CognigyClient {
    private voices;
    currentVoice: SpeechSynthesisVoice;
    private recognizer;
    private recognizing;
    private finalTranscript;
    private language;
    private onRecEnd;
    private onInterim;
    options: ISpeechOptions;
    constructor(options: ISpeechOptions);
    private initSpeechSynthesis(language, voiceName?);
    private initSpeechRecognigition();
    /**
     * Uses the browsers build-in html5-api to speak the given input
     * string using speech synthesis. Some browsers do not support that.
     * This method will not do anything on these older browsers.
     */
    say(message: string): void;
    /**
     * Allows to register a handler method which will be called when the
     * audio-recording finished. This can be e.g. used to send the transcript
     * of the audo-stream to the brain-server.
     */
    registerOnRecEnd(onRecEnd: (transcript: string) => void): void;
    /**
     * Allows to register a handler method which will be called when the
     * audio-recording sends an interim result.
     */
    registerOnInterim(onInterim: (transcript: string) => void): void;
    /**
     * Toggles the audio-recording.
     *
     * @param lang Optional language parameter
     */
    toggleRec(lang?: string): void;
}