Decibel Meter
- Min
- --
- Average (Leq)
- --
- Max
- --
Settings
dB(A) weighs sound the way human hearing does - the standard for noise and hearing safety.
Have a real sound level meter? Play a steady sound, then nudge this until both show the same number. It's remembered on this device.
How loud is that?
- 100+Dangerous - concert, nightclub, siren - risky within minutes
- 85+Very loud - lawn mower, motorbike, subway - risky for hours
- 70+Loud - busy traffic, vacuum cleaner, restaurant
- 50+Moderate - conversation, office, rain
- 30+Quiet - library, quiet bedroom, whisper
- 0+Very quiet - breathing, rustling leaves
Phone and laptop microphones aren't calibrated instruments: expect readings within about 5 dB of a real meter, less accurate for very quiet or very loud sound. Use it to compare and to spot risky noise, not for legal or workplace measurements.
Measure noise in dB(A) with your phone or laptop mic: live level, min, average (Leq) and max, a 60-second graph and safe exposure time.
Turn your phone or computer into a sound level meter. The meter listens through your microphone with the browser's automatic gain, noise suppression and echo cancellation switched off, applies A-weighting like a real meter, and shows the level now, the quietest and loudest moments, and the average (Leq) since you started. A 60-second graph shows how the noise changes, and when the average gets loud the page tells you how long a day you can listen safely. Nothing is recorded or sent anywhere.