Measure ambient noise in real-time using your microphone and compare it to everyday noise levels. Protect your hearing health.
This meter is a reference noise measurement tool using the Web Audio API. Measured values may differ from actual decibel levels depending on microphone quality, browser environment, and ambient conditions. For professional noise measurement, please use certified equipment. Results cannot be used for legal disputes or environmental noise complaints.
According to WHO, prolonged exposure to noise above 85 dB can cause noise-induced hearing loss. It develops gradually and is hard to notice early. When using earphones or headphones, keep volume below 60% and take 10-minute breaks every 60 minutes (the '60-60 rule').
This tool uses your device's built-in microphone and the Web Audio API for relative noise measurement. Unlike professional sound meters, there is no calibration, so absolute values may be imprecise. It is useful for gauging relative noise changes and approximate levels.
Click the lock icon next to the address bar to verify microphone permission is set to 'Allow.' Microphone access may be restricted on non-HTTPS sites. Conflicts can also occur if another app is using the microphone.
Yes. Select 'Manual Input Mode' to enter a dB value directly and view the noise level chart and health information.
According to NIOSH, exposure to 85 dB or above for over 8 hours risks hearing damage. Every 3 dB increase halves the safe exposure time. Noise above 100 dB is dangerous after 15 minutes, and 120 dB+ causes immediate pain.
A decibel (dB) is a unit expressing sound intensity on a logarithmic scale. Every 10 dB increase means 10× more sound energy and roughly 2× louder to the human ear. 0 dB represents the threshold of human hearing; typical indoor background noise is around 30–40 dB.
10 dB: rustling leaves, 30 dB: quiet library, 60 dB: normal conversation, 85 dB: city traffic (hearing damage threshold), 110 dB: rock concert, 130 dB: airplane takeoff. Most countries set daytime noise limits around 65 dB and nighttime limits around 60 dB.
Noise-induced hearing loss is irreversible, making prevention critical. Keep earphone volume at 60% or below and take 10-minute breaks every 60 minutes (the '60-60 rule'). In noisy environments, wear earplugs or noise-canceling headphones.