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Re: Implicit human echolocation
Perhaps a more ethical study would involve using virtual sound
techniques, i.e one could make KEMAR recordings at various distances
from an obstructing wall and present these to listeners via headphones.
Then you could also devise various tasks, i.e. ask for explicit distance
estimates, or discrimination between between multiple alternatives, etc.
In this way you might also work on figuring out the mechanism (assuming
people _can_ do this task, to some extent) by manipulating the presented
signals (i.e. more or less echoes, introducing spectral notches etc).
Erik Larsen, Ph.D. candidate
Speech and Hearing Bioscience and Technology
Harvard-MIT Division of Health Sciences and Technology
Cambridge MA 02139
Peter Lennox wrote:
I think this is quite important. Of course, there are degrees of echolocation, and it might be that the scale of echolocation vaires between blind and sighted, so that, in most contexts, sighted tend to use it less. how you would test that would be interesting...
Dr. Peter Lennox
Signal Processing Applications Research Group
University of Derby
Int. tel: 3155
"Bruno L. Giordano" <bruno.giordano@xxxxxxxxxxxxxxx> 05/30/07 2:31 PM >>>
I have a general knowledge of the literature on human echolocation:
sighted-blindfolded listeners are capable of locating nearby surfaces
from the reflections of self-generated sounds, when they are instructed
to do so.
However, does echolocation persist in absence of explicit instructions?
An improbable single-trial experiment could address this question:
blindfolded participants are asked to walk along a path, as long as they
wish. They wouldn't be informed that a wall is obstructing the path.
Unfortunately, the number of injuries would measure implicit
Is anybody aware of related, more ethical studies?
Bruno L. Giordano, Ph.D.
Music Perception and Cognition Laboratory
Schulich School of Music, McGill University
555 Sherbrooke Street West
MontrÃal, QC H3A 1E3
Office: +1 514 398 4535 ext. 00900
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PhD candidate Speech and Hearing Bioscience and Technology
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