LG LS860 - Manual (Page 79)

79
Safety
In the example to the left, if a hearing aid meets the M2 level
rating and the wireless phone meets the M3 level rating, the
sum of the two values equal M5. This should provide the
hearing aid user with “normal usage” while using their
hearing aid with the particular wireless phone. “Normal usage” in this
context is defined as a signal quality that’s acceptable for normal operation.
The M mark is intended to be synonymous with the U mark. The T mark
is intended to be synonymous with the UT mark. The M and T marks are
recommended by the Alliance for Telecommunications Industries Solutions
(ATIS). The U and UT marks are referenced in Section 20.19 of the FCC
Rules. The HAC rating and measurement procedure are described in the
American National Standards Institute (ANSI) C63.19 standard.
When you're talking on a cell phone, it's recommended that you turn the BT
(Bluetooth) or WLAN mode off for HAC
For information about hearing aids and digital wireless phones
Wireless Phones and Hearing Aid Accessibility
http://www.accesswireless.org/Home.aspx
FCC Hearing Aid Compatibility and Volume Control
http://www.fcc.gov/cgb/consumerfacts/hac_wireless.html
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.