Re: Screen Flicker Test

You might like to consider using Ramp-Ascend from Deque. It is an accessibility evaluation and repair tool  that can detect the flicker violation and  change the flicker to an acceptable level automatically.
The Ramp series of tools are listed  at
http://www.w3.org/WAI/ER/existingtools.html
  Thanks,
  Sailesh Panchang
  Senior Accessibility Engineer 
  Deque Systems,11180  Sunrise Valley Drive, 
  4th Floor, Reston VA 20191
  Tel: 703-225-0380 Extension 105 
  E-mail: sailesh.panchang@deque.com
  Fax: 703-225-0387
  * Look up <http://www.deque.com> *



  ----- Original Message ----- 
  From: John Colby 
  To: Lubow Scott ; w3c-wai-ig@w3.org 
  Sent: Tuesday, March 01, 2005 1:45 PM
  Subject: RE: Screen Flicker Test


  The only Flicker meter I've found is a mains voltage monitor - not very good.

   

  The only thing we can think of is a calibrated strobe lamp that you can shine on the flickering object and vary the rate of flashes - but it would need to be calibrated pretty accurately.

   

  Difficult one.

   

  John

   

  John Colby 

  Lecturer, School of Computing and Information

  Room F328a, Feeney Building, University of Central England,

  Franchise Street, Perry Barr, Birmingham B42 2SU

   


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

  From: w3c-wai-ig-request@w3.org [mailto:w3c-wai-ig-request@w3.org] On Behalf Of Lubow Scott
  Sent: 01 March 2005 18:26
  To: w3c-wai-ig@w3.org
  Subject: Screen Flicker Test

   

  Hi All,

  Please forgive me if this question has been asked numerous times.  Does anyone know a way to test an object to determine if it flickers between 2 and 55 Hz?  I saw somewhere that you could use a stop watch but I can't imagine someone being able to count 55 times in a second.  

  Thanks in advance,

  Scott