Room impulse response measurement - in the browser!

Check it out on danielrudrich.github.io/Broom.

Behind the scenes

Broom uses the WebAudioAPI to play out a sine sweep and record the room response with the microphone input. Playback and recording is handled by a custom AudioWorkletProcessor, so that both are in sync.

The captured sweep response will then be deconvolved using a weighted inverse sweep to yield the impulse response of the room. This happens in an OfflineAudioContext. The result will be displayed and encoded into the Wav format for the user to download.

Run it locally

In case you want to check out the project and run it locally:

npm install
npm run build  # or `npm run watch` for an auto-recompilation if a file changes

You will need to start a webserver serving the dist/ folder e.g. with live-share, http-server, ...

Planned Features

• Multi-channel capturing (afaik, browsers should be able to handle up to three input channels)

Known Issues

• Seems that some browser still apply some auto-gain, first measurement could be affected by that.
• Not compatible with older browsers (needs AudioWorklet, and no feedback to the user if unsupported
• Samplerate handling problematic on Firefox, as it doesn't support sampleRate constraint