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Appendix 115
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:
Ţ Set the volume in a quiet environment and select the lowest volume
at which you c
an hear adequately.
Ţ 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.
Ţ Do not turn the volume up to block out noisy surroundings. If you
choose to listen to your portable device in a noisy environment, use
noise-cancelling headphones to block out background environmental
noise.
Ţ Limit the amount of time you listen. As the volume increases, less
time is required before your hearing could be affected.
Ţ Avoid using headphones after exposure to extremely loud noises,
such as rock concerts, that might cause temporary hearing loss.
Temporary hearing loss might cause unsafe volumes to sound normal.
Ţ Do not listen at any volume that causes you discomfort. If you
experience ringing in your ears, hear muffled speech or experience
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