User's Manual

49
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 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.