Specifications

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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
For additional information on what loud noises do to your ear and chart reference
http://www.abelard.org/hear/hear.php#loud-music