Specifications

2
ENGLISH
SOUND NOISE
LEVEL (dB)
EFFECT
Whisper 30 Very quiet
Quiet Office 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 hrs.) begins
Garbage Truck, 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 Concerts (varies) 110-140 Threshold of pain begins
around 125dB
*Chart information obtained from http://www.nidcd.nih.gov/health/education/teachers/common_sounds.asp