How loud is the room

How it works

Press Start listening and allow the microphone. The meter fills with the room's current loudness and a word — Quiet, Moderate, or Loud — reads at a glance from across the room. Press Fullscreen to throw it on the projector.

The number is a relative 0 to 100, not decibels. A phone or laptop microphone is not a calibrated sound-level meter, and every mic and room is different, so this shows relative loudness for managing a room, not a measurement you could compare to a dB safety limit.

Good to know

It measures, it does not record. The only thing read from the microphone is how strong the signal is right now. That value drives the meter and is thrown away every frame; there is no buffer, no file, and no upload.

If the meter barely moves, the browser may have picked a very quiet input, or the mic is muted in your system settings. If it pins to the top, the input gain is high — move the meter further from the noise, or lower the mic level in your settings.

Check for yourself that nothing is sent anywhere

You don't have to take our word for it. Every browser has a built-in panel that shows everything a page sends or receives over the internet. On a computer (this doesn't work on a phone):

1. Press F12, or right-click anywhere on this page and choose Inspect.
2. In the panel that opens, click the Network tab.
3. Now use the tool: press Start listening and make some noise.
4. Watch the Network list. Nothing appears, because the sound is measured on your own device and never leaves it.