javascript - 如何使用 Web Audio API 降低麦克风输入的噪音？

Question

我一直在尝试使用 Web Audio API 并将笔记本电脑的麦克风用作输入源。不过，当我听输入时，我能听到很多白噪音；我怎样才能创建一个过滤器来降低噪音，使声音更清晰？有没有针对这种情况提供预写噪声过滤器的库？

Answer 1

'`我正在研究一些 POC 并使用 BiquadFilter 减少笔记本电脑的“生命周期 Nose ”。我也用过压缩器，但你不必))

(function(){
    var filter, compressor, mediaStreamSource;

    // Start off by initializing a new context.
    var context = new (window.AudioContext || window.webkitAudioContext)();


    navigator.getUserMedia = navigator.getUserMedia || navigator.webkitGetUserMedia;
    navigator.getUserMedia( {audio:true}, initAudio , function(err){
        console.log('usermedia error', err)
    });



    function initAudio(stream) {
        compressor = context.createDynamicsCompressor();
        compressor.threshold.value = -50;
        compressor.knee.value = 40;
        compressor.ratio.value = 12;
        compressor.reduction.value = -20;
        compressor.attack.value = 0;
        compressor.release.value = 0.25;

        filter = context.createBiquadFilter();
        filter.Q.value = 8.30;
        filter.frequency.value = 355;
        filter.gain.value = 3.0;
        filter.type = 'bandpass';
        filter.connect(compressor);


        compressor.connect(context.destination)
        filter.connect(context.destination)

        mediaStreamSource = context.createMediaStreamSource( stream );
        mediaStreamSource.connect( filter );
    }
})();