import { Platform } from "@ionic/angular";
export declare class WebSpeech {
    private platform;
    constructor(platform: Platform);
    /**
     * 语音识别
     * @desc
     * 注意：需要校验说话开始和结束时间2-3秒后，自动结束语音听取
     * @see
     * https://www.jianshu.com/p/e42638839475
     * @param word
     */
    recognition: any;
    startRecognition(words?: string): void;
    /**
     * TTS合成
     * @param sentence：要说的句子
     * @param pitch: 音调，取值范围(0 - 2) 默认值：1
     * @param rate: 语速，取值范围(0.1 - 10) 默认值：1
     * @param volume: 音量，取值范围(0 - 1) 默认值：0.5
     * @see
     * https://zhuanlan.zhihu.com/p/141582231
     */
    speak(sentence: any, pitch?: number, rate?: number, volume?: number): void;
    speakWithEdge(sentence: any, pitch?: number, rate?: number, volume?: number): void;
    getVoiceByName(name: any): SpeechSynthesisVoice;
}