W3C home > Mailing lists > Public > w3c-wai-ig@w3.org > July to September 2013

Re: Frequency range for audio

From: Gregg Vanderheiden <gv@trace.wisc.edu>
Date: Thu, 29 Aug 2013 01:11:01 -0500
Cc: "w3c-wai-ig@w3.org" <w3c-wai-ig@w3.org>
Message-Id: <9E658B5C-91BD-4361-A77D-34705A7FD3C7@trace.wisc.edu>
To: Vivienne CONWAY <v.conway@ecu.edu.au>
I looked into this back when we were doing 508 the first time and again on TEITAC.

There IS a frequency range for LIGHT --  

but NOT for SOUND.

Instead it is very variable.   And often it is a pattern.   Someone will have a seizure with the opening of a symphony -- but not for other symphonies by that composer or any others.   

I was unable to find any information on any frequency or pattern that caused problems across people.

If you do find anything - let me know.  But I couldn’t. 

thx

Gregg
--------------------------------------------------------
Gregg Vanderheiden Ph.D.
Director Trace R&D Center
Professor Industrial & Systems Engineering
and Biomedical Engineering University of Wisconsin-Madison
Technical Director - Cloud4all Project - http://Cloud4all.info
Co-Director, Raising the Floor - International - http://Raisingthefloor.org
and the Global Public Inclusive Infrastructure Project -  http://GPII.net

On Aug 29, 2013, at 12:47 AM, Vivienne CONWAY <v.conway@ecu.edu.au> wrote:

> Hi all
>  
> Does anyone know of a frequency range which is known to trigger seizures?  I know there was a proposal by a European group on audio seizures and frequencies in 2008 but don't know if anything came of that.  I have heard that repetitive sounds and/or low or high frequencies might trigger epilepsy, but haven't seen anything definitive.
>  
> I'd really appreciate it if anyone has information on this for guidance.
>  
>  
> Regards
>  
> Vivienne L. Conway, B.IT(Hons), MACS CT, AALIA(CS)
> PhD Candidate & Sessional Lecturer, Edith Cowan University, Perth, W.A.
> Director, Web Key IT Pty Ltd.
> v.conway@ecu.edu.au
> v.conway@webkeyit.com
> Mob: 0415 383 673
>  
> This email is confidential and intended only for the use of the individual or entity named above. If you are not the intended recipient, you are notified that any dissemination, distribution or copying of this email is strictly prohibited. If you have received this email in error, please notify me immediately by return email or telephone and destroy the original message.
> 
> This e-mail is confidential. If you are not the intended recipient you must not disclose or use the information contained within. If you have received it in error please return it to the sender via reply e-mail and delete any record of it from your system. The information contained within is not the opinion of Edith Cowan University in general and the University accepts no liability for the accuracy of the information provided.
> 
> CRICOS IPC 00279B




Received on Thursday, 29 August 2013 06:11:32 UTC

This archive was generated by hypermail 2.3.1 : Thursday, 29 August 2013 06:11:32 UTC