Beats Electronics executive, Руководство пользователя

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