Re: making a sound unrecognizable

[Valeriy Shafiro <Valeriy_Shafiro@xxxxxxxx>]

Ursula,

You can try some vocoder processed sounds with different spectral
resolution.  You can hear some samples here
http://www.rushu.rush.edu/cds/arl/DEMOS/CIwebdemo/

AS far as making hybrid sounds with the spectrum of one and the envelope of
another, I think Brian Gygi did some research with environmental sounds
along those lines a couple of years ago.

Regards,

Valeriy

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Valeriy Shafiro
Communication Disorders and Sciences
Rush University Medical Center
Chicago, IL

office (312) 942 - 3298
lab    (312) 942 - 3316
email: valeriy_shafiro@xxxxxxxx



-----AUDITORY Research in Auditory Perception <AUDITORY@xxxxxxxxxxxxxxx>
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To: AUDITORY@xxxxxxxxxxxxxxx
From: Ursula Kirmse <ukirmse@xxxxxxxxxxxxxx>
Sent by: AUDITORY Research in Auditory Perception
<AUDITORY@xxxxxxxxxxxxxxx>
Date: 09/12/2006 11:26AM
Subject: making a sound unrecognizable

Dear list members,

I'm looking for a possibility to change/edit a environmental or at least
natural sound in a way  that it is not any longer recognizable as what
it is, but, however, for doing this with changing as less acoustic
parameters as possible. ;-)  The intention is to use these sounds in a
MMN paradigm and it is important that  both "versions" of the sound are
acoustically as similar as possible.
The main point is that the sound (that can also be a more complex thing
as the sound of a barking dog or a something like that) should be not
possible to be recognized as what it is.

I would be very happy about ideas or would like know if maybe somebody
has already tried something like this?  I would also be very happy about
recommations for software or matlab scripts that could be helpful in
respect to this. For example I'm looking for a way to transfer the
amplitude envelope from one sound to another (I already wrote a matlab
routine for this, but its not yet functioning perfectly fine and the
result is not completely convincing).

So if anybody has a an idea I would be grateful.

best regards and thanks a lot,
Ursula Kirmse

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Ursula Kirmse
University of Leipzig
Cognitive & Biological Psychology
Institute of Psychology I
Seeburgstrasse 14-20
04103 Leipzig, Germany
Phone +493419735978/Fax +493419735969
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