FCC Record, Volume 26, No. 19, Pages 14991 to 15893, October 24 - November 10, 2011 Page: 14,991
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Federal Communications Commission
WASHINGTON, D.C. 20554
In the Matter of )
Amendment of the Commission's Rules ) WT Docket No. 07-250
Governing Hearing Aid-Compatible Mobile
SECOND FURTHER NOTICE OF PROPOSED RULEMAKING
Adopted: November 1, 2011 Released: November 1, 2011
Comment Date: 30 days after publication in the Federal Register
Reply Comment Date: 45 days after publication in the Federal Register
By the Chief. Wireless Telecommunications Bureau and the Chief, Office of Engineering and Technology:
1. The Commission's wireless hearing aid compatibility rules ensure that consumers with
hearing loss are able to access wireless communications services through a wide selection of handsets
without experiencing disabling radio frequency (RF) interference or other technical obstacles. In order to
ensure that the hearing aid compatibility rules cover the greatest number of wireless handsets and reflect
recent technological advances, the Wireless Telecommunications Bureau (WTB) and Office of
Engineering and Technology (OET) propose in this Notice, pursuant to authority delegated by the
Commission, to adopt the most current hearing aid compatibility technical standard into the
2. To define and measure hearing aid compatibility, the Commission's rules reference the
2007 revision of American National Standards Institute (ANSI) technical standard C63.19 (the "2007
ANSI Standard"). formulated by the Accredited Standards Committee C63" - Electromagnetic
Compatibility (ASC (63").' A handset is considered hearing aid-compatible for acoustic coupling if it
meets a rating of at least M3 under the 2007 ANSI Standard.' A handset is considered hearing aid-
47 C.F.R. t 20.19(h)( I)(ii). )(2)(ii)i). ;rants of certification issued before January 1. 2010. under earlier versions
of ANSI ('63.19 remain x alid. i.
Searing aids operating in acoustic coupling mode reccixe through a microphone and then amplify all sounds
surrounding the user, including both desired sounds, such as a telephone's audio signal, and unwanted ambient
1 47 C.F.R. 20.1 9(h)( I )(ii). o use a digital , wireless phone with a hearing aid or cochlear implant in acoustic
coupling mode, radio frequency (RF) intcrfercnce and other electromagnetic interference from the wireless phone
must be controlled. ANSI '63.19 specifies ratings for digital wireless phones, M I through M4. based on their RF
emission levels, with M I being the highest emissions and M4 the lowest emissions. The standard also provides a
methodology for rating hearing aids from M I to M4 based on their immunity to interference, with M I being the
least immune and M4 the most immune. 'To determine w'hcther a particular digital wireless phone is likely to
interfere with a particular hearing aid, the immuLnity rating of the hearing aid is added to the emissions rating of the
Federal Communications Commission
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United States. Federal Communications Commission. FCC Record, Volume 26, No. 19, Pages 14991 to 15893, October 24 - November 10, 2011, book, November 2011; Washington D.C.. (digital.library.unt.edu/ark:/67531/metadc133013/m1/15/: accessed July 21, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.