You didn't say anything about you playback system, but that, especially the transducers, is most likely affecting your perceptions, too.

-David.

> -----Original Message-----
> From: Thomas Neuhaus [mailto:neuhaus@folkwang.uni-essen.de]
> Sent: Sunday, March 21, 1999 3:24 PM
> To: Rosati
> Cc: csound@maths.ex.ac.uk
> Subject: Re: Balancing loudness
>
>
> 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.
>
>
>