Thread Subject: 1194.23 (i) Hearing Aid coupling & Interference -Not just for Telecom

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From: Gregg Vanderheiden
Date: Sun, Apr 08 2007 5:30 PM
Subject: 1194.23 (i) Hearing Aid coupling & Interference -Not just for Telecom

The hearing aid coupling and interference provisions should not just apply
to telephones. They should apply any time a product has a 'speaker' that
is held to the ear in normal operation. For example, exhibits with
earcups, ATM with handsets, Information booths with handsets or earcups.



Conversely, a speakerphone that has no handset should not have to meet this
requirement.



Also, this shouldn't apply to headphones and headsets that plug into a
standard user accessible jack on a product since a person with a hearing aid
could use a neckloop instead plugging it into the same user accessible jack.






Suggest rewording these to begin and end as follows



(h) "Where a product delivers output by an audio transducer which is
normally held up to the ear, a means for effective magnetic wireless
coupling to hearing technologies shall be provided that allows the user of
such technologies to effectively utilize the telecommunication product.]
This does not include headphones and headsets that plug into a standard user
accessible jack on a product.



(i) "Where a product delivers output by an audio transducer which is
normally held up to the ear, [Interference to hearing technologies
(including hearing aids, cochlear implants, and assistive listening devices)
shall be reduced to the lowest possible level that allows a user of hearing
technologies to utilize the product. Should metrics be added like the TIA
cordless standards?? or a reference to ANSI/IEEE?? or other standards?].
This does not include headphones and headsets that plug into a standard user
accessible jack on a product.




Gregg

------------------------

Gregg C Vanderheiden Ph.D.
Professor - Depts of Ind. Engr. & BioMed Engr.
Director - Trace R & D Center
University of Wisconsin-Madison
< <http://trace.wisc.edu/> http://trace.wisc.edu/> FAX 608/262-8848

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