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http://hearingloss.org/content/telephones-
and-mobile-devices
Caution: Avoid potential hearing
loss.
Prolonged exposure to loud sounds (including
music) is the most common cause of
preventable hearing loss. Some scientific
research suggests that using portable audio
devices, such as portable music players and
cellular telephones, at high volume settings
for long durations may lead to permanent
noise-induced hearing loss. This includes
the use of headphones (including headsets,
earbuds and Bluetooth® or other wireless
devices). Exposure to very loud sound has
also been associated in some studies with
tinnitus (a ringing in the ear), hypersensitivity
to sound and distorted hearing. Individual
susceptibility to noise-induced hearing loss
and other potential hearing problems varies.
The amount of sound produced by a portable
audio device varies depending on the nature
of the sound, the device, the device settings
and the headphones. You should follow some
commonsense recommendations when using
any portable audio device:
• Set the volume in a quiet environment and
select the lowest volume at which you can
hear adequately.
• When using headphones, turn the volume
down if you cannot hear the people
speaking near you or if the person sitting
next to you can hear what you are listening
to.
• Do not turn the volume up to block
out noisy surroundings. If you choose
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