The National Institute on Deafness and Other Communication Disorders (NIDCD) notes that exposure of just one minute to sounds of 110 decibels or higher can damage your hearing. No more than 15 minutes of unprotected exposure is recommended for noises of 100 decibels, as well as several hours exposure to noises of 90 decibels or higher. Here’s the decibel level of some common noises:
140 decibels: rock concerts, firecrackers
120 decibels: boom cars, snowmobiles
110 decibels: chain saw
100 decibels: woodshop
90 decibels: lawn mower, motorcycle
80 decibels: city traffic noise
60 decibels: normal conversation
40 decibels: refrigerator humming
20 decibels: whispered voice
0 decibels: threshold of normal hearing
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