Hearing Aid
Compatibility
When some mobile handsets are used with certain hearing devices (including hearing aids andcochlear implants), users may detect a noise which can interfere with the effectiveness of the hearing device.
Some hearing devices are more “immune” than others to this interference noise, and mobile handsets can also vary in the amount of interference noise they may generate at any given time. ANSI standard C63.19 was developed to provide a standardized means of measuring both mobile handset and hearing devices to determine usability rating categories for both.
Ratings have been developed for mobile handsets to assist hearing device users find handsets that may be compatible with their particular hearing device. Not all mobile handsets are rated for compatibility with hearing devices, but mobile handsets that are rated should have the rating available. This rating may depend on the position of a retractable antenna.
Results will vary depending on the user’s hearing device and individual type and degree of hearing loss. If a hearing device is particularly vulnerable to interference noise, even a mobile handset with a higher rating may still cause unacceptable noise levels in the hearing device. Evaluate your personal needs by trying out the mobile handset with your hearing device.
“M” Rating: Mobile handsets rated M3 or M4 meet FCC requirements for hearing aid compatibility and are likely to generate less interference to hearing devices than handsets that are not labeled. (M4 is the “better” or higher of the two ratings.)
"T" Rating: Mobile phones rated T3 or T4 meet FCC requirements for compatibility with
Hearing devices may also be measured for immunity to interference noise from mobile handsets. In some cases, hearing devices can be modified or “hardened” to improve operation with a mobile handset. Your hearing device manufacturer or hearing health professional may help you improve the interaction of your mobile handset and hearing device. Not all hearing devices are rated for compatibility with mobile handsets, but hearing devices that are rated should have the rating
117
