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Cellular Phone Forum / General / GSM / February 2004gsm & hearing aids
Most of the carriers in my area use CDMA. That is fortunate for me since the TDMA phones that I have tried cause so much interference with my hearing aids that it is impossible for me to use them. I've only tried one GSM phone, but it caused similar interference. Is this a common problem with all GSM phones and hearing aids, or might I just have had a bad one? TIA tom > Most of the carriers in my area use CDMA. That is fortunate > for me since the TDMA phones that I have tried cause so much [quoted text clipped - 4 lines] > interference. Is this a common problem with all GSM phones and > hearing aids, or might I just have had a bad one? You might find useful information at: http://www.gsmworld.com/using/health/hearingaidfaq.shtml John >> Most of the carriers in my area use CDMA. That is fortunate >> for me since the TDMA phones that I have tried cause so much [quoted text clipped - 9 lines] > >John It is going to require careful design of the hearing to avoid the problem with GSM, outside the USA where EMI shiedling requirements are much lower, you can hear GSM phones being polled, and before they start to ring, you often hear the 217 Hz tone on radios (even if turned off!), TV's and anything else with a speaker! Normall FCC compliance would prevent a problem in the USA, but a Hearing aid is exempt because it is intended for mobil use. >>>Most of the carriers in my area use CDMA. That is fortunate >>>for me since the TDMA phones that I have tried cause so much [quoted text clipped - 15 lines] > start to ring, you often hear the 217 Hz tone on radios (even if > turned off!), TV's and anything else with a speaker! I hear this all the time in my car radio, tuned to the lower end of FM with the handset in it's dash cradle. Sometimes it's an incoming call and sometimes not. When the 6340i is in geek mode, the 0101 screen show SDCC instead on CCCH while this 'noise' is heard on the car radio - and often predictable on some street locations. I've always presumed it's the handset chatting away with a BTS for reasons I'm not certain I actually care about, but I don't hear this when using the CD player nor with the radio off. > Normall FCC compliance would prevent a problem in the USA, but a > Hearing aid is exempt because it is intended for mobil use.  Signaturejer email reply - I am not a 'ten' ICQ = 35253273 "All that we do is touched with ocean, yet we remain on the shore of what we know." -- Richard Wilbur >Most of the carriers in my area use CDMA. That is fortunate for me >since the TDMA phones that I have tried cause so much interference [quoted text clipped - 3 lines] >this a common problem with all GSM phones and hearing aids, or might I >just have had a bad one? Most cellular phones are not hearing aid compatible without the use of an additional device to use them. Nokia has a device called a hearing aid loop that you can use to make their phones compatible with hearing aids. I believe it's not just limited to GSM phones. Regular cell phones are not meant to be used with hearing aids. - - - - - - - - - - - - - - - - - - - - - - - - - - remove NONO from .NONOcom to reply Thanks for the info. I guess that I am fortunate that most of the carriers in my area use CDMA. The backlights sometimes cause interference, but the phones themselves do not. I wonder what the hearing-impaired to in Europe. Again, thanks. tom > Thanks for the info. I guess that I am fortunate that most of the > carriers in my area use CDMA. The backlights sometimes cause > interference, but the phones themselves do not. I wonder what the > hearing-impaired to in Europe. Savor a much simpler way of life without the need for cell phones? ;-) Seriously, I suspect headset use is more prevalent. Might not the speaker in a headset be compatible with the T-coil in a hearing aid? (Provided you use a headset that fits over the ear rather than wedged in it!) Plus, leaving the handset on your belt might minimize any RF interference. |
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