Everything on this site, in one place.
The live sound level meter: real-time decibel gauge, frequency spectrum, 60-second history chart, session stats (average, peak, minimum, exposure time), and a real-world sound comparison table with everyday sound-level guidance.
Record 10 seconds of sound in two different places and see them side by side — which is quieter, by how many decibels, and whether you'd actually hear the difference. Includes a guide to fair comparisons and FAQs.
A free, teacher-friendly noise monitor for the classroom. Project it on your board, set a noise limit, and let students see when the room is getting too loud. Runs fullscreen in any browser, with tips for using it well.
Guides and explainers on sound, noise, and decibels — plain-English reading to go along with the tools.
Send us a question, bug report, or feature idea. The form opens a draft in your own email app — no data passes through a server.
How Noise-Meter handles your microphone and data — in short: everything stays on your device, nothing is recorded or uploaded.
This page — an overview of the whole site.