put on headphones and try and talk

voicejammer.js

var AudioContext = window.AudioContext || window.webkitAudioContext;
var audioContext = new AudioContext();

var synthDelay = audioContext.createDelay(0.2);
synthDelay.connect(audioContext.destination)
// request audio stream from the user's webcam
navigator.mediaDevices.getUserMedia({
  audio: true
})
.then(function (stream) {
  var mediaStreamNode = audioContext.createMediaStreamSource(stream);
  mediaStreamNode.connect(synthDelay);
})