User's Manual

3
English
Listen Responsibly
To avoid hearing damage, make sure that the volume on your
music player is turned down before connecting your headphones.
After placing headphones in / on your ears, gradually turn up the
volume until you reach a comfortable listening level.
Noise levels are measured in decibels (dB), exposure to any noise
at or above 85 dB can cause gradual hearing loss.
Monitor your use; hearing loss is a function of loudness versus time.
The louder it is, the less time you can be exposed to it. The softer it is,
the more time you can listen to it.
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
This decibel (dB) table compares some common sounds and shows
how they rank in potential harm to hearing.
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 Concert
(varies)
110–140 Threshold of pain begins
around 125 dB
*Chart information obtained from http://www.nidcd.nih.gov/health/education/teachers/pages/common_sounds.aspx
Malleus
Cochlear Nerve
Stapes
Tympanic
Membrane
Auditory Canal
Cochlea
Incus
Vestibule
To Nose/Throat