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Safety
characters, adjust the volume as needed to minimize the error rate.
For optimal performance, your phone sh ould be at least 12 inches (30
centimeters) from the TTY device. Placing the pho ne too close to the
TTY device may cause high error rates.
Avoid potential hearing loss.
Prolonged exposure to loud sounds (including music) is the most
common cause of preventable hearing loss. Som e 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 noise-induced h earing loss. This
includes the use of headphones (including headsets, earbuds and
Bluetooth or other wireless devices). Exposure to very loud so und
has also been associated in some studies with tinnitus (a ringing in
the ear), hypersensitivity to sound and distorted he aring. Individual
susceptibility to noise-induced hearing loss and ot her potential
hearing problems varies.
The amount of sound produced by a portable audio device vari es
depending on the nature of the sound, the device, the device sett ings
and the headphones. You should follow some common sens e
recommendations when using any portable au dio 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 c annot hear
the people speaking near you or if the person si tting next to you can
hear what you are listening to.
Do not turn the volume up to block out noisy surroundings. If yo u
choose to listen to your portable device in a noisy enviro nment,
use noise-cancelling headphones to block ou t background
environmental noise.
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