Whistle.js is a lightweight whistle detector/analyzer written in pure javascript. Whistle.js acquires the user’s microphone input via getUserMedia and keeps monitoring certain frequencies, believed to be the “whistling” ones. When their level becomes high enough, an event (“whistle” by default) is triggered on an element (“document” by default).
[button color=”black” size=”medium” link=”http://skycocker.github.io/whistle.js/” target=”blank” ]Whistle.js[/button]
