Thread Subject: 2.2-C - Audio Connection - with suggestions from Telecom

From: Gregg Vanderheiden
Date: Mon, Sep 24 2007 2:35 PM

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On the telecom call today several issues were identified and ideas were
suggested. This posting lists a suggested version to address the issues
as well as the need for connection on kiosks, fare machines etc. The Issues
that are addressed are listed below the suggested new wording.



2.2-C - Audio Connection

When products provide auditory output beyond simple tonal feedback or
signaling, one of the following must be true

(a) Auditory output is available via audio transducer that is designed
to be held up to the ear that meets 2.2-A (Magnetic Coupling), 2.2-B
(Interference with Hearing Device), and 2.2-E (Volume - gain) and product
does not require simultaneous use of keyboard; or

(b) A standard 2.5mm or 3.5mm audio jack at the standard signal levels
used for headphones/headsets is provided or

(c) Product is a not designed to be located in a public location and an
adapter from the product's audio output format to a 2.5mm or 3.5mm phone
jack is commonly available or available from the manufacturer.

Note: RJ-9, USB, and Bluetooth connections all have commonly available
adapters. Products (not designed for public locations) with these or other
forms of audio connection that have adapters would meet 2.2-C-(c)




Rationale


- public phones have amplification and coupling and that meets
needs of almost all users so shouldn't need a jack

- users should not be required to carry 'all' adapters with them so
public systems should not require them to have an adapter to use the product
(other than a simple 2.5 to 3.5 or 3.5 to 2.5 adapter)

- RJ-9 connector has adapters as does Bluetooth. Note was added
since there was concern that unless in a note, purchasing agents may not
recognize it as allowable.

- Addresses the issue of "private listening' which is provided via
the standard handset.

- Kiosks with keyboards usually require blind people to have both
hands free.




How it would apply


- public phones would use (a)

- office phones could use (b) but would likely use (c)

- computers with build in speech conversation could use (b) or (c)

- Kiosks without keyboards could use (a) or (b)

- Kiosks WITH keyboards would have to use (b) (or, of course,
both a and b)






Gregg

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

Gregg C Vanderheiden Ph.D.

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