On an anecdotal experience-
When doing graduate outplacement at the VA, it was common
knowledge that some sort of anti-theft device in the gift shop of the
hospital made it unbearable for hearing-aid users... I'm not sure if this
was due to motion sensors or not. Users reported no amplification and odd
buzzes in their aids.
On 5 Sep 1997, mark ross wrote:
> Anybody have experience, information, reports, etc. on the interference
> caused by ultrasonic motions detectors (at 25 kHz) on the operation of
> hearing aids?
>> Mark Ross