#cellphone interference

the following info comes from Western Institute for the Deaf and Hard of Hearing:

FCC Mandates Cell Phone Compatibility with Hearing Aids- ANSI C63.19

FCC Mandates Cell Phone Compatibility with Hearing Aids- ANSI C63.19 March 22, 2007 // Published as a news service by IHS Mobile phone manufacturers have one year to comply with a U.S. Federal Communications Commission (FCC) mandate requiring mobile handsets built or used in the U.S. to comply with the American national standard for cell phone-hearing aid compatibility. Issued in 2003, the mandate is intended to ensure that new mobile phones available on the market are accessible to individuals using hearing aids.

According to the American National Standards Institute (ANSI), mobile phone manufacturers and service providers will have to ensure that at least 50% of all handsets marketed in the U.S. meet the requirements of ANSI C63.19:2006 - Methods of Measurement of Compatibility between Wireless Communications Devices and Hearing Aids by Feb. 18, 2008.

Approved as an American national standard in 2001, ANSI C63.19 was developed by the ANSI Accredited Standards Committee (ASC) C63 on electromagnetic compatibility, a group administered by the Institute of Electrical and Electronics Engineers (IEEE).

A measurement standard for hearing aid compatibility with wireless communications devices, ANSI C63.19-2006 aims to achieve an acceptable level of performance between cell phones and hearing aids by reducing the interference of radio frequency emissions.

The standard defines emissions and immunity-to-interference requirements, as well as test methods to determine the level of interoperability between the devices. The standard is intended to apply to all types of hearing aids with acoustic output.

According to ANSI, an estimated 28 million Americans have some degree of hearing impairment; by 2030, this number is expected to double. The Hearing Aid Compatibility Act of 1988 (HAC Act) directed the FCC to ensure that all telephones manufactured or imported for use in the U.S., and all "essential" telephones - including phones provided for emergency use, coin-operated phones and phones in the workplace, hospitals, nursing homes and hotel rooms - be hearing aid-compatible.

The increasing reliance on wireless mobile phones for business and personal use, coupled with the growing number of technologically-savvy baby boomers, led the FCC to put pressure on wireless carriers and equipment manufacturers to increase the number of hearing aid-compatible wireless phones available on the market.

IEEE C63.19 2007-JAN-01 • Active/Current • Methods of Measurement of Compatibility between Wireless Communications Devices and Hearing Aids

This standard applies to both wireless communications devices (WDs) and hearing aids. It sets forth uniform methods of measurement and parametric requirements for the electromagnetic and operational compatibility and accessibility of hearing aids used with WDs, including cordless, cellular, personal communications service (PCS) phones, and voice over internet protocol (VoIP) devices, operating in the range of 800 MHz to 3 GHz. However, this version is focused on existing services, which are in common use. Accordingly, in this version tests are provided for services in the 800 MHz to 950 MHz and 1.6 GHz to 2.5 GHz frequency bands. Future versions may add test for other frequency bands, as they come into more common use.

This standard is intended to apply to all types of hearing aids with acoustic output, including, as examples, behind-the-ear (BTE), in-the-ear (ITE), in-the-canal (ITC), and completely-in-the-canal (CIC) types. Test methods are provided for hearing aids operating in acoustic (microphone input) mode or in T-Coil input mode.