User guide

101
Caution
Avoid potential hearing loss.
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
noise-induced hearing 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: