デシベルメーター
マイクを使用して周囲の騒音レベルをリアルタイムで測定。dBA値を表示。
Reference levels:
- 0-30 dB: Very quiet (whisper, rustling leaves)
- 30-50 dB: Quiet (library, quiet conversation)
- 50-70 dB: Moderate (normal conversation, office)
- 70-90 dB: Loud (traffic, vacuum cleaner)
- 90-110 dB: Very loud (concert, power tools)
- 110+ dB: Painful (jet engine at close range)
Note: Browser microphone accuracy is limited. Use as an approximate reference only.