騒音計 - サウンドチェッカー dB測定

How many decibels is the noise around you?

Sound Checker is an app that measures ambient noise levels in real time using your smartphone's microphone.

■ When to use it:

・If you're concerned about noise from your neighbor's apartment

・If you want to check the volume of snoring or teeth grinding

・If you want to check the noise level at construction sites or event venues

・If you want to check the ambient noise level in a baby's room

・If you want to measure the quietness of cafes or offices

■ Main Features

【Real-time Measurement】

A large meter displays the current noise level in real time. You can see the dB value and noise level (quiet, normal, loud, dangerous) at a glance.


【Waveform Graph】

Displays the noise level for the last 30 seconds in a graph. You can visually check changes in sound.


【Measurement History】

Automatically records the minimum, average, and maximum dB for each measurement. You can review past measurement results anytime.


【Noise Level Guide】

Includes WHO (World Health Organization) recommended standards and Japanese environmental standards. You can get an idea of ​​whether the current noise level will affect your health.

■ Noise Level Guidelines

・Below 30dB: Very quiet (residential area at night)

・40-50dB: Quiet (library, office)

・60-70dB: Normal to slightly noisy (normal conversation)

・Above 80dB: Loud (subway, vacuum cleaner)

・Above 100dB: Dangerous (live music venue, construction site)

■ Safety and Security

・The microphone is used for measurement only. No recorded data is saved or transmitted.

・All functions are completely free to use.

*This app is a simple noise level guide using your smartphone's microphone. For use as legal evidence or for precise measurements, please use a dedicated noise meter.