Hearing aid hears theft detectors?

JOHN JMCDONAL at PPD.UKY.EDU
Tue Jul 8 15:26:29 EST 1997


HearWHAC wrote:
> 
> Jim Lellman wrote:
> > Apparently more stores are using those little labels and the detectors
> > at the doorway.  My son wears a hearing aid with a bone vibrator.
> > He can "hear" the detectors at the doorway when he walks by them.
> 
> Jim's comments have generated an interesting discussion thread. My
> comment is not directly related to "theft detectors," but there are some
> devices available that automatically turn lights on and off with "motion
> detectors." You will occasionally find one of these in use in a rest
> room that is not frequently used. When you enter the room, your motion
> causes the lights to come on. After you leave and there is no motion for
> a certain period of time, the lights go out - energy saving device.
> 
> These devices generate a sound at a high frequency that cannot be heard
> by the human ear. One of our hearing aid patients was a school teacher
> and they installed this feature in her class room. The high frequency,
> in this case, 25,000 Hz, caused her hearing aid to "jam." This posed a
> very difficult problem for her, and for us - should we ask the hearing
> aid manufacturer to change the hearing aid - or should the school system
> ask the device manufacturer to change the frequency. They eventually had
> to do the latter and the frequency was changed one octave to 50,000 Hz,
> enough to eliminate the hearing aid "jamming" problem. I share this
> experience because some of you may run into a similar situation.
> 
> Paul Woodard ;-)


I have the same problem with motion detectors. We have many devices in
the building I work in. I have learned to live with it. Can the hearing
aid makers fix this. In my case I wear Oticon Personic BTE's



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