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From: George Erwin-Grotsky
Date: Tue, Mar 11 2014 10:59AM
Subject: Visual and auditory dynamic range mapping
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Does anyone know of any research, white papers, draft proposals, or other
work regarding defining accessibility standards to assist users with
hypersensitive vision and hearing as is common with migraine?

I basically envision it as user settings for something like the maximum
tolerable luminance and sound volume level. Add minimum thresholds of
perception and you've got a user-defined range for the auditory and visual
content to be mapped into.

This would also benefit users who don't suffer such perception issues. For
example, gone would be the days of cranking the volume way up so you can
hear a song that's mastered at a very soft level, then getting blasted with
painfully loud sound when the next song starts (possibly even contributing
to hearing damage). The volume adjustments would be made for you
automatically. The original media would not be limited, just the
presentation of it, and the full range of the content would still be
available under user control.

This concept could be extended to compensate for other factors that can be
problematic for some users, such as contrast, color deficiency, playback
speed (audio, video, text-to-voce, animation, visual & auditory cues, etc.).

Certainly, there are many details to sort out and specify.

Reactions? Thoughts? Opinions? References? Resources? Interest?

From: Lynn Wehrman
Date: Tue, Mar 11 2014 11:08AM
Subject: Re: Visual and auditory dynamic range mapping
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I would also find this interesting, being a migraine sufferer myself and because a number of our test consultants live with cognitive issues that are exacerbated by loud and persistent sound. The WCAG does cover sound regulation by the user here, defined by the sound not overpowering the ability of the user to hear their screen reader: http://www.w3.org/TR/UNDERSTANDING-WCAG20/visual-audio-contrast-dis-audio.html Not sure if that covers what you're considering.

Lynn Wehrman

From: Alastair Campbell
Date: Thu, Mar 13 2014 7:53AM
Subject: Re: Visual and auditory dynamic range mapping
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George Erwin-Grotsky wrote:

> This concept could be extended to compensate for other factors that can be
> problematic for some users, such as contrast, color deficiency, playback
> speed (audio, video, text-to-voce, animation, visual & auditory cues,
> etc.).
>

I'd be interested, I don't know of any off-hand though. I once used
www.lingscars.com as an extreme example of animation and visual
'intensity'... and gave someone a migraine. I now do warnings before that
example!

-Alastair