Re: Faces, vegetables, and speech ("(Rebecca Mercuri)" )

Subject: Re:  Faces, vegetables, and speech
From:    "(Rebecca Mercuri)"  <mercuri(at)GRADIENT.CIS.UPENN.EDU>
Date:    Wed, 23 Sep 1992 11:10:49 EDT

There are visual analogues for most auditory "illusions" -- the Necker Cube effect is described by Diana Deutch in a left-right ear illusion in the Journal of the Audio Engineering Society's special issue on auditory illusions, September 1983. The frequencies whose wavelengths are approximately equal to the width of the human head can be detected most accurately in space, as we know from experimentation. Sine waves may produce a more prominant effect than continuously varying sound waves, as would naturally occur in analog speech or tone production. This fact may be relevant to understanding the observation that different virtual "speakers" appear to be producing the tones. Binaural perception should perhaps be considered in the manner in which your experiments are being conducted. Disparities in phase and loudness are both concerns of binaurality. To eliminate this variable, perhaps the experiment should be conducted monaurally? Rebecca Mercuri mercuri(at)

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