Online Decibel Meter
Real-time sound level measurement tool. Test ambient noise and measure decibel levels using your device microphone.
Microphone Access Required
Please grant microphone access to start measuring sound levels.
Microphone Error
Unable to access microphone. Please check your permissions and try again.
解决方案：
- 请确保使用 HTTPS 或 localhost 访问
- 点击浏览器地址栏的🔒图标，允许麦克风权限
- 检查系统是否允许浏览器访问麦克风
- 尝试刷新页面重新授权
- Chrome用户：chrome://settings/content/microphone
0
dB
Silent
Current Level
0 dB
Max Level
0 dB
Average Level
0 dB
Calibration
Adjust calibration settings to improve accuracy and match professional sound meters.
0 dB
Sound Level Examples
20 dB
Whisper
40 dB
Library
50 dB
Office
60 dB
Normal Conversation
70 dB
City Traffic
80 dB
Vacuum Cleaner
90 dB
Lawn Mower
110 dB
Rock Concert
130 dB
Jet Engine