User's Manual

50
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 hearing loss.
This includes the use of headphones (including headsets, ear
buds and Bluetooth®, or other wireless devices). Exposure to
very loud sound has also been associated in some studies with
tinnitus (ringing in the ear), hypersensitivity to sound, and
distorted hearing. 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. Hence,
individual susceptibility to noise-induced hearing loss and other
hearing problems can vary. Please follow these important
guidelines for hearing loss prevention:
1. Set the phone’s volume in a quiet environment and select
the lowest volume for which you can hear clearly.
2. 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.
3. Do not turn the volume up to block out noisy surroundings.
If you choose to listen to your portable device in a noisy
environment, consider using noise-cancelling headphones
to block out background noise.
4. As the volume increases, less time is required before your
hearing could be affected, so consider limiting your
listening time.
5. Avoid using headphones after exposure to extremely loud
noises (e.g.: live concerts) that might cause temporary
hearing loss which, in turn, might cause unsafe volume
levels to sound like normal levels.
6. 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 health care provider.
You can obtain additional information on this subject from the
following sources: