- From: Gregg Vanderheiden <gv@trace.wisc.edu>
- Date: Sun, 31 Oct 2004 15:37:32 -0600
- To: <w3c-wai-gl@w3.org>
- Message-ID: <auto-000148774403@spamarrest.com>
Hi David, Yes - I noted that they did say the same thing about 20db. I just posted it as reinforcement since there is usually so much confusion with the different db's. Regarding the right number for the guideline: I think 20db is the right number for the guideline. There is no number that would be acceptable to movie makers and that would meet the needs of people with hearing disabilities. That is why this is at Level 3. It is advice for people who are making things and want to go the extra yard to make them accessible. Gregg -- ------------------------------ Gregg C Vanderheiden Ph.D. Professor - Ind. Engr. & BioMed Engr. Director - Trace R & D Center University of Wisconsin-Madison _____ From: w3c-wai-gl-request@w3.org [mailto:w3c-wai-gl-request@w3.org] On Behalf Of David MacDonald Sent: Sunday, October 31, 2004 1:26 PM To: w3c-wai-gl@w3.org Subject: re:audio contrast Hi Greg Thanks for posting your lesson on decibels. It reiterates what I posted to the list and is in perfect alignment with my findings and calculations. Perhaps we should open this up again to the hard of hearing community because the 20dbs contrast is in my opinion going to be difficult to sell to many film makers etc. In doing this exercise of making the examples, I realized that the concept of "audio contrast" may be something to take back to industry. I envision new media devices which will have audio contrast as a control (like tone and bass). New media such as films etc. would deliver the audio background separately from the audio foreground so the consumer can adjust the contrast. (Of course this is outside the scope of our work). Cheers David MacDonald ------------------------------------------ Access empowers people... .Barriers disable them. www.eramp.com
Received on Sunday, 31 October 2004 21:37:43 UTC