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Appendix 105
Hearing devices may also be rated. Your hearing device manufacturer or hearing health professional may
help you find this rating. Higher ratings mean that the hearing device is relatively immune to interference
noise. The hearing aid and wireless phone rating values are then added together. A sum of 5 is considered
acceptable for normal use. A sum of 6 is considered for best use.
In the above example, 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 is 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.
For information about hearing aids and digital wireless phones
FCC Hearing Aid Compatibility and Volume Control:
http://www.fcc.gov/cgb/dro/hearing.html
Gallaudet University, RERC:
http://tap.gallaudet.edu/DigWireless.KS/DigWireless.htm
SAR Information
• 1.490 W/kg @1g (Head)
• 1.380 W/kg @1g (Body)
THIS MODEL DEVICE MEETS THE GOVERNMENT’S REQUIREMENTS FOR EXPOSURE TO RADIO WAVES.
Your wireless mobile CDMA phone is a radio transmitter and receiver. It is designed and manufactured not to
exceed the emission limits for exposure to radio frequency (RF) energy set by the Federal Communications
Commission of the U.S. Government. These limits are part of comprehensive guidelines and establish
permitted levels of RF energy for the general population. The guidelines are based on the safety standards
previously set by both U.S. and international standards bodies:
• American National Standards Institute (ANSI) IEEE. C95.1-1992.
• National Council on Radiation Protection and Measurement (NCRP). Report 86. 1986.
• International Commission on Non-Ionizing Radiation Protection (ICNIRP) 1996.
• Ministry of Health (Canada), Safety Code 6. The standards include a substantial safety margin designed
to assure the safety of all persons, regardless of age and health.
The exposure standard for wireless mobile CDMA phone employs a unit of measurement known as the
Specific Absorption Rate, or SAR. The SAR limit set by the FCC is 1.6W/kg*. Tests for SAR are conducted with
the device transmitting at its highest certified power level in all tested frequency bands. Although the SAR
is determined at the highest certified power level, the actual SAR level of the device while operating can be
well below the maximum value. This is because the device is designed to operate at multiple power levels
so as to use only the power required to reach the network. In general, the closer you are to a wireless base
station antenna, the lower the power output. Before a device model is available for sale to the public, it must
be tested and certified to the FCC that it does not exceed the limit established by the government adopted
requirement for safe exposure. The tests are performed in positions and locations (e.g., at the ear and worn on
the body) as required by the FCC for each model.