Specifications

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 125 dB

*Chart information obtained from http://www.nidcd.nih.gov/health/education/teachers/common_sounds.asp

“… a typical person can safely listen to an iPod for 4.6 hours per day at 70% volume.”

“… knowing the levels one is listening to music at, and for how long

is extremely important.”

From http://www.cbc.ca/health/story/2006/10/19/music-earphones.html

Get the most out of your equipment and enjoy great audio performance even

at safe levels. Our headphones will allow you to hear more details at lower

volume levels than ever before.

Physiology of the Ear and Hearing

For additional information on what loud noises do to your ear and chart reference

http://www.abelard.org/hear/hear.php#loud-music