サウンドチェッカー - 騒音計dBデシベル測定

What's the noise level around you? Sound Checker measures ambient noise levels in real-time using your phone's microphone.

• Check apartment noise from neighbors
• Measure snoring or teeth grinding volume
• Monitor noise at construction sites or events
• Check sound levels in your baby's room
• Measure quietness of cafes and offices

Features:

• Real-time dB measurement with large meter display
• 30-second waveform graph
• Measurement history (min/avg/max dB auto-saved)
• WHO noise level guidelines & Japan environmental standards

Your microphone is used only for measurement. No audio data is stored or transmitted. Completely free with all features available.

Note: This app provides approximate noise level readings using your smartphone's microphone. For legal evidence or precise measurements, please use a professional sound level meter.