Re: making a sound unrecognizable (the satanic trick)

[Massimo Grassi <massimo.grassi@xxxxxxxx>]

Hi Ursula,

> 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.

a good way to make a sound unrecognisable is to play it backward in  
time (see for example, the ASA demo cd). Acoustics parameters are  
untouched (although time reversed). It might not work for amplitude  
steady sounds (e.g. a food blender).

Ciao,
m
********************
Massimo Grassi - PhD
Laboratorio di Psicologia
Via Petracco 8 - 33100 Udine - Italy
http://www.psy.unipd.it/~grassi
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