Monster Beats by Dr.Dre Manual And Warranty page 5

English
"[...] 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
Malleus Cochlear Nerve
Incus
Auditory Canal
Vestibule
Tympanic
Membrane
Stapes
To Nose/Throat
For additional information on what loud noises do to your ear and chart reference
http://www.abelard.org/hear/hear.php#loud-music
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Cochlea
English
Use Responsibly
Do not use headphones when it's unsafe to do so—while operating
a vehicle, crossing streets, or during any activity or in an environment
where your full attention to your surroundings is required.
It's dangerous to drive while wearing headphones, and in many places
illegal, because it decreases your chances of hearing life-saving sounds
outside of your vehicle, such as another car's horn and emergency
vehicle sirens.
Please avoid wearing your headphones while driving. Use one
of Monster's FM transmitters to listen to your mobile media
devices instead.
Learn how to establish a safe listening level and review other
important safety guidelines from the Consumer Electronics Association
at www.ce.org and the Deafness Research Foundation at www.drf.org.
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