Pantech 78 User Manual

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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.

•  Excessive sound pressure from earphones can cause hearing loss.

•  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.