Operation Manual

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Standard Institute (ANSI) standard C63.19. There are two sets of ANSI standards
with ratings from one to four (four being the best rating): an “M” rating for
reduced interference making it easier to hear conversations on the phone when
using the hearing aid microphone, and a “T” rating that enables the phone to be
used with hearing aids operating in the telecoil mode thus reducing unwanted
background noise.
HOW WILL I KNOW WHICH WIRELESS PHONES ARE HEARING AID
COMPATIBLE?
The Hearing Aid Compatibility rating is displayed on the
wireless phone box.
A phone is considered Hearing Aid Compatible for acoustic coupling (microphone
mode) if it has an “M3” or “M4” rating. A digital wireless phone is considered
Hearing Aid Compatible for inductive coupling (telecoil mode) if it has a “T3” or
“T4” rating.
HOW WILL I KNOW IF MY HEARING AID WILL WORK WITH A PARTICULAR
DIGITAL WIRELESS PHONE?
You’ll want to try a number of wireless phones so that you can decide which
works the best with your hearing aids. You may also want to talk with your
hearing aid professional about the extent to which your hearing aids are immune
to interference, if they have wireless phone shielding, and whether your hearing
aid has a HAC rating.
FOR MORE INFORMATION ABOUT HEARING AIDS AND DIGITAL WIRELESS
PHONE
• FCC Hearing Aid Compatibility and Volume Control –
http://www.fcc.gov/cgb/dro/hearing.html
•
Hearing Loss Association of America –
http://www.hearingloss.org/learn/cellphonetech.asp
•
CTIA – http://www.accesswireless.org/hearingaid/
•
Gallaudet University, RERC – http://tap.gallaudet.edu/voice
FDA CONSUMER UPDATE
U.S. FOOD AND DRUG ADMINISTRATION  CENTER
FOR DEVICES AND RADIOLOGICAL HEALTH
CONSUMER UPDATE ON WIRELESS PHONES
1. Do wireless phones pose a health hazard?
The available scientic evidence does not show that any health problems are
associated with using wireless phones. There is no proof, however, that wireless
phones are absolutely safe. Wireless phones emit low levels of radiofrequency
energy (RF) in the microwave range while being used. They also emit very
low levels of RF when in the idle mode. Whereas high levels of RF can produce
health eects (by heating tissue), exposure to low level RF that does not produce
heating eects causes no known adverse health eects. Many studies of low
level RF exposures have not found any biological eects. Some studies have
suggested that some biological eects may occur, but such ndings have not
been conrmed by additional research. In some cases, other researchers have
had diculty in reproducing those studies, or in determining the reasons for
inconsistent results.