Thread Subject: Re: Need comments on provision for InterferncewithHearing Devices

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From: Diane Golden
Date: Tue, Jul 31 2007 2:00 PM

OK, now I have to say I'm completely confused. Acoustic feedback is whole
different issue from electromagnetic interference. Perhaps I'm wrong, but
my assumption was always that this standard was trying to address the EMI
problem, not acoustic feedback issues. Most feedback is a by-product of the
hearing aid fitting, earmold choice, and positioning of the hearing aid mic
in relation to anything in the environment (usually not E&IT).

Diane Golden
NASCIO

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Subject: Re: [teitac-telecom] Need comments on provision for
InterferncewithHearing Devices



During yesterday's conference call, either Brenda or Karen mentioned that
the only way to test this is to hold a hearing aide near the device and
check for feedback. Can we include a statement to that effect?

(Alternative suggestion from Brenda's email of 7/29)
Potential sources of interference to hearing technologies (including hearing
aids, cochlear implants, and assistive listening devices) must be reduced as
much as possible to provide a more compatible environment for a user of
hearing technologies to utilize the telecommunications product.

(Terry's modification of the alternative)
Potential sources of interference to hearing technologies (including hearing
aids, cochlear implants, and assistive listening devices) must be reduced so
that a hearing aide does not produce any audible feedback when held within
?? inches/centimeters of the device.

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