iPhone/iPad対応の「Decibel Meter – sound level db measurement tool – Vlad Polyanskiy」が一日限定で無料になっています。通常240円です。
「Decibel Meter」は、周囲のノイズレベルを測定するアプリです。
場所ごとのデータを記録することや、CSV／オーディオ形式ファイルでの書き出しが可能です。
DBチャート：
150-160 dB = Eardrum rupture
140 decibel = Aircraft carrier deck.
130 dB = Jet take-off (100 meters), gun blast at close range.
120 dB= Human pain threshold, loud rock concert.
110 decibel = Serious hearing damage if sustained for more than 1 hour.
100 dB = Serious hearing damage if sustained for more than 8 hours.
90 decibel = Likely hearing damage if sustained for more than 8 hours.
80 decibel = Potential but unlikely hearing damage if sustained for more than 8 hours.
70 dB = Just annoying, but probably safe.
60 dB= Typical conversational volume.
50 dB = A quiet, library conversation.
40 decibel = A whisper.
30 dB= Barely audible sound.
20 decibel= Threshold of human hearing.
