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Re: FW: cross-modality-size-loud

Do you if anyone has mapped measures of image size (or apparent source width -
which, as Potard pointed out can actually refere to height as well as width) to
judgements of size-of-object?

Dr. Peter Lennox
Signal Processing Applications Research Group
University of Derby
Int. tel: 3155

>>> Densil Cabrera <d.cabrera@xxxxxxxxxxxxxxxx> 19/09/2007 04:44 >>>
Dear list,

The idea of 'auditory volume' seems to be related to this discussion.
Investigated mostly in the first decades of the 20th Century, auditory
volume is a subjective judgment of the 'size' of sound - or more
precisely, the size of the auditory image. That's different to the size
of a sound source, but it may be related 'ecologically'. S.S. Stevens'
PhD thesis is about volume and loudness (Harvard 1933). The general
findings in the early years was that judgments of size were positively
correlated to sound pressure level, and negatively correlated to the
frequency (of pure tones). Later research investigated the perceived
size of noise bands (effect of bandwidth), the effect of duration, and
the effect of interaural coherence.

Over the past 40 or so years, the concept of auditory image size has
come to be considered important in auditorium acoustics and spatial
audio. The most investigated parameter in those fields has been the
interaural cross correlation function. However recent work by Russell
Mason (in spatial audio) and Ingo Witew (in auditorium acoustics) seems
to show some connection to the phenomena investigated in the auditory
'volume' literature.

You can confirm the phenomenon of sound pressure level affecting
auditory image size by concealing a loudspeaker behind a curtain with a
visual grid on it, and for various stimuli asking subjects to identify
the edges of the (apparent) sound source. This is what we did some years
ago in:

D. Cabrera and S. Tilley (2003) "Parameters for auditory display of
height and size," 9th International Conference on Auditory Display,
Boston , USA , 29-32. (available from www.icad.org 
<http://www.icad.org/> ). [By the way, if anyone is interested in the
other aspect of that paper - pitch-height vs vertical localization, we
have recently published on that: D. Cabrera and M. Morimoto (2007)
"Influence of fundamental frequency and source elevation on the vertical
localization of complex tones and complex tone pairs," Journal of the
Acoustical Society of America, 122(1), 478-488.]

Densil Cabrera

Head, Acoustics Research Laboratory

Associate Dean (Research)

Faculty of Architecture, Design and Planning

University of Sydney NSW 2006 Australia

Tel. +612 9351 5267 Skype densilcabrera

Fax. +612 9351 3031 densil@xxxxxxxxxxx 



On 17/09/2007, pieter jan stallen <pj.stallen@xxxxxxxxx> wrote: 

Dear List,

Does anyone know of  experimental psychological data reported which
refutes (or not) the hypothesis: the perception of object O as "has much
of quality X" predisposes to the perception also of "has much of quality
Y"? E.g., is there empirical evidence for cross-modal bonds like "large
objects (much of size) are loud objects (much of sound)" ? 

Although I see brain research approaching the subject (e.g.
<http://www.dhushara.com/pdf/synesthesia.pdf> ) I have not (yet) found
so much empirical psychology about such metaphors. I may not have
studied carefully enough the synaestesia literature, but appreciate any
more specific 'forwardings' then.

Pieter Jan Stallen / Chair Community Noise Annoyance / University of
Leiden / Netherlands

Dr Jan Schnupp
University of Oxford
Dept. of Physiology, Anatomy and Genetics
Sherrington Building - Parks Road
Oxford OX1 3PT - UK
www.oxfordhearing.com <http://www.oxfordhearing.com/>  

Dr. Bob Carlyon
MRC Cognition & Brain Sciences Unit
15 Chaucer Rd.
Cambridge CB2 7EF
Phone: +44 1223 355294 ext 651
Fax:   +44 1223 359062
www.mrc-cbu.cam.ac.uk <http://www.mrc-cbu.cam.ac.uk/> 

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