Beats by Dr Dre executive User Guide - Page 7
This decibel dB table compares some common sounds and shows how they, rank in potential harm
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English This decibel (dB) table compares some common sounds and shows how they rank in potential harm to hearing. SOUND Whisper Quiet Offce Vacuum Cleaner, Hair Dryer Food Blender Garbage Truck, Cement Mixer Power Saw, Drill/Jackhammer Rock Concert (varies) NOISE LEVEL (dB) 30 EFFECT Very quiet 50-60 Comfortable hearing levels are under 60 dB 70 Intrusive; interferes with telephone conversations 85-90 85 dB is the level at which hearing damage (8 hrs.) begins 100 No more than 15 minutes of unprotected exposure recommended for sounds between 90-100 dB 110 Regular exposure to sound over 100 dB of more than 1 minute risks permanent hearing loss 110 -140 Threshold of pain begins around 125 dB *Chart information from http://www.nidcd.nih.gov/health/education/teachers/pages/common_sounds.aspx 5