如何使用 Web 音频 API 防止语音转录中的说话者反馈

async function getmicrophonestream() {    const constraints = {        audio: {            echocancellation: true,            noisesuppression: true,            autogaincontrol: true        }    };    try {        const stream = await navigator.mediadevices.getusermedia(constraints);        return stream;    } catch (err) {        console.error('error accessing the microphone', err);        return null;    }}

async function setupaudioprocessing(stream) {    const audiocontext = new audiocontext();    const source = audiocontext.createmediastreamsource(stream);    // create a dynamicscompressornode for additional processing    const compressor = audiocontext.createdynamicscompressor();    compressor.threshold.setvalueattime(-50, audiocontext.currenttime); // example settings    compressor.knee.setvalueattime(40, audiocontext.currenttime);    compressor.ratio.setvalueattime(12, audiocontext.currenttime);    compressor.attack.setvalueattime(0, audiocontext.currenttime);    compressor.release.setvalueattime(0.25, audiocontext.currenttime);    // connect nodes    source.connect(compressor);    compressor.connect(audiocontext.destination);    return { audiocontext, source, compressor };}

async function startSpeechRecognition() {    const stream = await getMicrophoneStream();    if (!stream) return;    const { audioContext, source, compressor } = await setupAudioProcessing(stream);    const recognition = new (window.SpeechRecognition || window.webkitSpeechRecognition)();    recognition.continuous = true;    recognition.interimResults = true;    recognition.onresult = (event) => {        for (let i = event.resultIndex; i  {        console.error('Speech recognition error', event.error);    };    recognition.start();    // Handle audio context resume if needed    if (audioContext.state === 'suspended') {        audioContext.resume();    }    return recognition;}// Start the speech recognition processstartSpeechRecognition();