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Publicidad
ENGLISH
SOUND
Whisper
Quiet Office
Vacuum Cleaner, Hair Dryer
Food Blender
Garbage Truck, Cement
Mixer
Power Saw, Drill/
Jackhammer
Rock Concerts (varies)
*Chart information obtained from http://www.nidcd.nih.gov/health/education/teachers/common_sounds.asp
NOISE
EFFECT
LEVEL (dB)
30
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 125dB
2
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