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Re: Your comments on WCAG 2.0 Public Working Draft of May, 2007

From: Ben Maurer <bmaurer@andrew.cmu.edu>
Date: Sat, 3 Nov 2007 15:08:17 -0400 (EDT)
To: public-comments-wcag20@w3.org
Message-ID: <Pine.LNX.4.64-044.0711031506140.10390@unix33.andrew.cmu.edu>

Hi,

On Sat, 3 Nov 2007, Loretta Guarino Reid wrote:
> ----------------------------------------------------------
> Comment 1: Audio CAPTCHAs
> Source: http://lists.w3.org/Archives/Public/public-comments-wcag20/2007Jul/0214.html
> (Issue ID: 2355)
> ----------------------------
> Original Comment:
> ----------------------------
>
> Audio CAPTCHAs need to include substantial amounts of background noise
> in order to be secure against robotic attacks
>
> Audio CAPTCHAs must also not be captioned for obvious reasons.
>
> Proposed Change:
> To 1.4.6 add:
>
> "Except if the audio is provided as a CAPTCHA and a non-audio CAPTCHA
> is available that provides equivalent access"
>
> To 1.2.* add:
>
> "Except if the media is provided as a CAPTCHA and an image only
> CAPTCHA is provided" (similar to the text in 1.1.1)
>
> ---------------------------------------------
> Response from Working Group:
> ---------------------------------------------
>
> We have changed 1.4.6 to include this exception.
>
> (changes marked with ***)
> "1.4.6 Low or No Background Audio: Audio content *** that is not an
> audio CAPTCHA and *** that contains speech in the foreground does not
> contain background sounds, background sounds can be turned off, or
> background sounds are at least 20 decibels lower than the foreground
> speech content, with the exception of occasional sound effects."

This addresses my comment.

> Regarding captions, an audio-only CAPTCHA would not be considered
> multimedia and would therefore not need to be captioned.

Ok, that sounds good.

-b
Received on Saturday, 3 November 2007 19:08:26 UTC

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