Answers

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2014-05-26T11:40:21+05:30
Whisper 30 db
normal conversation 60-65 db 
telephone dial tone - 80 db
city traffic 85 db 
train whistle 90 db
jackhammer 95 db
hand drill 98 db
power mower 107 db 
 power saw 110 db
jet engine 140 db
gauge shotgun blast 165 db
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