[no subject]

[LASZLO Toth <tothl@xxxxxxxxxxxxxxx>]

>From tothl Wed Nov 12 15:07:01 +0100 1997 remote from inf.u-szeged.hu
Date: Wed, 12 Nov 1997 15:07:01 +0100 (MET)
From: Toth Laszlo <tothl@inf.u-szeged.hu>
X-Sender: tothl@csilla
To: Multiple recipients of list AUDITORY <AUDITORY@VM1.MCGILL.CA>
Subject: Problem with Seneff's model
Message-ID: <Pine.SV4.3.91.971112142420.25769A-100000@csilla>
MIME-Version: 1.0
Received: from inf.u-szeged.hu by inf.u-szeged.hu; Wed, 12 Nov 1997 15:07 MET
Content-Type: TEXT/PLAIN; charset=US-ASCII
Content-Length: 1901

Dear List,

I have a rather technical problem with Seneff's ear model (with the
"inner hair cell/synapse model" part). I've implemented it following the
Journal of Phonetics 1988 theme issue. All processing stages seem to work
fine, except the "rapid AGC" routine, which practically has no effect
(there's a figure showing the model's response to a sinusoid signal - I
used this to verify the correctness of my implementation).
As an alternative source I've also checked Malcolm Slaney's Auditory Toolbox,
in which there's a source code taken from B.D. Bryant and J.D. Gowdy.
Their code does exactly the same as mine. There's also a figure in the
documentation: "Figure 3 of Seneff's paper can be duplicated with the
following statements ... which produces the following plot ..." and the
rapid AGC stage of the figure is clearly different from the one in the
article. Strange that neither the authors, nor Mr. Slaney have noticed
this (?).
I guess that someone of you uses this model, had realized and cured
this problem. If so, I'd be very glad if you shared your solution with me.
I'd also be happy if someone could point me to other (detailed) references
(or implementation sources) on this model, so I could find a correction
myself.

Thanks,
Laszlo

******************************************************************************
*               Toth Laszlo                   *                              *
*        Hungarian Academy of Sciences        * "In our life there's if      *
*  Research Group on Artificial Intelligence  *  In our beliefs there's lie  *
*                                             *  In our business there's sin *
*     e-mail: tothl@inf.u-szeged.hu           *  In our bodies there's die"  *
*     http://www.inf.u-szeged.hu/~tothl       *                              *
******************************************************************************