| On Mon, 15 Mar 1999, Rosati wrote:
> Greetings-
>
> If, for example, a sine tone was gliss. from 64 to 20000 cps at a constant
> amplitude, it appears to get louder as the pitch increases. Does anyone
> know what is the easiest way to balance this so that loudness remains
> constant across the frequency spectrum?
Our ears respond quite nonlinear to different frequencies. the appropriate
functions can be found in any good book on acoustics
(like D.E. Hall: Musical Acoustics
1991 Brooks/Cole Publishing Co. Pacific Grove
CA)
So put these curves into wavetables indexed by desired loudness and
frequency respectively. This is not an allto easy way but seems to me a
correct one :-)
Hope that helps
Thopmas
--
Thomas Neuhaus(neuhaus@folkwang.uni-essen.de) Phone (49)-201-4903-333
ICEM Institut fuer Computermusik und elektronische Medien
Folkwang-Hochschule Essen, Klemensborn 39, D-49239 Essen
-------------------------------------------------------------------------------
UNIX _is_ user-friendly. It just knows who its friends are.
|