Samsung Convoy SCH-u640 User Manual page 102

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• D o not turn the volume up to block out noisy surround-
ings. If you choose to listen to your portable device in
a noisy environment, use noise-cancelling head phones
to block out background environmental noise.
• L imit the amount of time you listen. As the volume
increases, less time is required before your hearing
could be affected.
• A void 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.
• D o 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 listen ing to
your portable audio device, discontinue use,
and consult your doctor
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