Whistlerr is a whistle detection program which implements M. Nilsson's research paper - "Human Whistle Detection and Frequency Estimation".

Although it's accurate, it may fail against significant background noise. Demo here.

Tested in node and Chrome and Safari browser.

It works by detecting high energy spikes in the band of 500-5000Hz where most people blow whistles.

On the browser it uses HTML5 WebAudio API, and on node it relies on mic npm module.

You have to include build/whistle.build.js and then call whistlerr with callback function and threshold value.

sampleThreshold is the minimum number of positive samples required to report a whistle.

High sampleThreshold may fail to detect low intensity whistles while low sampleThreshold may report too many.

whistlerr.setConfig({
    sampleThreshold : 8
});

whistlerr.detect(function(){
    console.log("Whistle detected: ", result)
});

see docs/index.html for a full example.

see node/index for a full example.