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BST_m840_UG_.book Page 157 Monday, May 13, 2013 1:29 PM
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 potential hearing problem varies.
Additionally, the amount of sound produced by a
portable audio device varies depending on the nature
of the sound, the device settings, and the
headphones that are used. As a result, there is no
single volume setting that is appropriate for everyone
or for every combination of sound, settings, and
equipment.
You should follow some common sense
recommendations when using any portable audio
device:
• Always turn the volume down before plugging the
earphones into an audio source.
• Set the volume in a quiet environment and select the
lowest volume at which you can hear adequately.
• Be aware that you can adapt to higher volume settings
over time, not realizing that the higher volume may be
harmful to your hearing.
• 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. By blocking
background environment noise, noise cancelling
headphones should allow you to hear the music at lower
volumes than when using earbuds.
• Limit the amount of time you listen. As the volume
increases, less time is required before you hearing could
be affected.
• 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.
2C. Settings 157
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