LAB-03 · acoustics
Noise Meter
How loud is it where you are, right now? Power on and your device becomes a live sound-level meter — with honest numbers and plain-language context.
-- dB
estimated · a-weighted
press power to start listening
peak
--
30s average
--
floor
--
level history1 bar / second · last 2 min
⚠ sustained level can damage hearing — NIOSH 8h limit is 85 dB
How accurate is this?
Honestly: within about ±5–10 dB. Phone and laptop microphones aren't calibrated instruments, so we disable the browser's auto-gain, apply an A-weighting filter (matching how human hearing responds), and use a calibration offset typical of consumer mics. Great for "is my room loud?" — not for regulatory measurements.
What the numbers mean
- 30–50 — libraries, quiet homes
- 50–70 — conversation, offices
- 70–85 — traffic, restaurants
- 85+ — hearing damage over time (NIOSH: 8h limit at 85 dB)
How to measure noise levels with your phone
- Press Power on and allow microphone access — the meter runs a quick self-test sweep, then goes live.
- Hold the device at arm's length, away from fans or your breath, for at least 30 seconds — the average matters more than the instant reading.
- Read the result in context: the needle zone, the plain-language description, and the peak / average / floor trio tell you whether the level is comfortable, distracting, or harmful over time.
No app install, no signup — this online decibel meter works in your browser on phones, tablets and laptops.
Everything runs on your device — audio is analyzed in real time and never recorded or uploaded. Curious what your ears can still hear? Try the hearing age finder next.