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Appendix 185
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 to listen to your portable device in a noisy environment, use
noise-cancelling headphones to block out background environmental
noise.
• Limit the amount of time you listen. As the volume increases, less time is
required before your hearing could be affected.
• Avoid using headphones after exposure to extremely loud noises,
such as concerts, that might cause temporary hearing loss. Temporary
hearing loss might cause unsafe volumes to sound normal.
• Do not listen at any volume that causes you discomfort. If you
experience ringing in your ears, hear muffled speech or experience
any temporary hearing difficulty after listening to your portable audio
device, discontinue use and consult your doctor.