Thread Subject: Re: Compatible with Prosthetics

Note

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From: Gregg Vanderheiden
Date: Mon, Apr 09 2007 12:05 AM

Hi Phill,



You wrote:



I believe the "either OR both" also fits the spirit of
508's § 1194.25 Self contained, closed products.

(d) When biometric forms of user identification or control are used, an
alternative form of identification or activation, which does not require the
user to possess particular biological characteristics, shall also be
provided.





Not sure I understand. Can you explain your meaning?

Did you mean ? either the biometric works or the person has a non-biometric
method?

Were you suggesting a change in this provision?



Thanks


Gregg
-- ------------------------------
Gregg C Vanderheiden Ph.D.






_____


From: = EMAIL ADDRESS REMOVED =
[mailto: = EMAIL ADDRESS REMOVED = ] On Behalf Of Phill Jenkins
Sent: Sunday, April 08, 2007 10:27 PM
To: TEITAC General Interface Accessibility Subcommittee
Cc: TEITAC subcommittee (hardware)
Subject: Re: [teitac-general] Compatible with Prosthetics


I believe this is a hardware subcommittee issue to resolve when considering
combining 255 & 508.

I caution the subcommittee to consider the burden it places on the agency
purchasing devices with touchscreens to require them to purchase BOTH a
"Touchscreen and touch-operated controls that are operable without requiring
body contact or close body proximity - AND - also provide mechanically
operated controls or keys that comply with 1194.23 (k) 1-4 [see note 2
below]. It would seem to me that if the agency provides at least one set of
controls and keys that are compliant with 1194.23 (k), then that is
sufficient. In other words, if they provided the control & keys compliant
with 1194.23 they could also still provide a touchscreen that is NOT
operable without requiring body contact, if it is true that some touch
screen are sensitive only to the touch of human body parts. (e.g. capacitive
screens). Wikipedia [see note 1 below] says that "Capacitive sensors can
either be touched with a bare finger or with a conductive device being
held", but I'm not sure if the conductive device also meets the (k) 2
requirement of not requiring tight grasping or pinching.

I believe the "either OR both" also fits the spirit of
508's § 1194.25 Self contained, closed products.

(d) When biometric forms of user identification or control are used, an
alternative form of identification or activation, which does not require the
user to possess particular biological characteristics, shall also be
provided.

Regards,
Phill Jenkins
IBM Research - Human Ability & Accessibility Center
http://www.ibm.com/able

Note 1 Wikipedia http://en.wikipedia.org/wiki/Touchscreen

Note 2:

508's - § 1194.23 Telecommunications products.
(k) Products which have mechanically operated controls or keys, shall comply
with the following:

(1) Controls and keys shall be tactilely discernible without activating the
controls or keys.

(2) Controls and keys shall be operable with one hand and shall not require
tight grasping, pinching, or twisting of the wrist. The force required to
activate controls and keys shall be 5 lbs. (22.2 N) maximum.

(3) If key repeat is supported, the delay before repeat shall be adjustable
to at least 2 seconds. Key repeat rate shall be adjustable to 2 seconds per
character.

(4) The status of all locking or toggle controls or keys shall be visually
discernible, and discernible either through touch or sound.


255's § 1193.51 (*)(c) Compatibility of controls with prosthetics.
Touchscreen and touch-operated controls shall be operable without requiring
body contact or close body proximity.

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