[ossrp-control] Re: What Is A Screen Reader?

Hi Will,

> human audition can only distinguish between audio signals that are
> separated by a 10 to 15 hertz gap in their respective frequencies. 

Actually this gap is strongly frequency dependent, and varies from
a few Hz to some 100 Hz for pure tones up to 10 kHz.

> This give human audition the ability to discriminate between
> approximately 1300 to 2000 different states of a signal, assuming
> the listener has a normal hearing range of around 20Hz to 20KHz.

This only applies to simple pure tones. For complex tones, human
auditory discrimination is a lot worse.

By the way, the First International Symposium on Auditory Graphs
(AGS 2005) will be held July 10 in Limerick, Ireland, in conjunction
with the International Conference on Auditory Display (ICAD), July
6-9, 2005. The conference URL is

http://sonify.psych.gatech.edu/ags2005/index.html 

Best regards,

Peter Meijer


Seeing with Sound - The vOICe
http://www.seeingwithsound.com/winvoice.htm

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