On Sun, 10 Sep 2006 00:08:22 GMT, B A R R Y
wrote:

On Sat, 09 Sep 2006 11:18:14 +0200, Mxsmanic
wrote:

You need up to 7 KHz or so for sibilants and some other phonological
features which are occasionally phonemic. This high-end response
makes it possible to distinguish between 'f' and 's' in
communications.

Then you won't be able to tell them apart as communications in general
is tailored to operate between 200 to 300 Hz and about 2500 to 3000
Hz. Response is just about nil at 7KHz, but the hearing in my left
ear is down 80 db at 8 KHz. OTOH at a useless 60 Hz its about a plus 8
to 10 db compared to normal. Right one is pretty good. Now if I could
only get rid of the ringing.:-))


Explain how you can tell the difference on the telephone. I know I
certainly can,, and multiplexing pretty much limits telephone calls @
3500 hz.

Telephone is pretty much zip for signal above 3 KHz let alone 3.5.
Roger Halstead (K8RI & ARRL life member)
(N833R, S# CD-2 Worlds oldest Debonair)
www.rogerhalstead.com