On 17/04/2011 02:28, Junfeng Li wrote:
Dear list,
I am now wondering how to subjectively evaluate distance perception in
virtual environments which might be synthesized using WFS or HOA (high-order
ambisonics). In my experiments, the sounds were synthesized at different
distances and presented to listeners for distance discrimination. However,
the listener cannot easily perceive the difference in distance between these
sounds.
Anyone can share some ideas or experiences in distance perception
experiments? or share some references on this issue?
Thank you so much.
Best regards,
Junfeng
-------------- next part --------------
An HTML attachment was scrubbed...
URL:<https://mail.music.vt.edu/mailman/private/sursound/attachments/20110417/64a7d936/attachment.html>
_______________________________________________
Sursound mailing list
Sursound@music.vt.edu
https://mail.music.vt.edu/mailman/listinfo/sursound
Hi List,
Just popped in.. It's been a while!
IMO it is a combination of time-of-flight and the inverse square law,
where t=0 is a virtual point in time determined by the brain as an
intercept by "plotting" a function of the intensity of (primarily)
transverse reflections against time. Fortunately it is not necessary to
work out how the brain might do this. One needs to concentrate
maximising the availability, and accuracy of the information that would
be needed to make such a calculation possible, without making too much
muddy reverb. in the process. Mono reverb does not seem to play much,
or possibly any, part in this. It seems to be extracted in some way from
larger ITDs and ILDs ie. transverse discrete reflections. It took me
several years to work all this out, and nobody seems to have
independently come to the same conclusion in the last decade or so.. so
it must be wrong. At least it is free and in the public domain now! My
Heli.wav on "Audio and Three Dimensional Sound Links* (long gone) was a
product of precisely this method of distance synthesis.
Regards,
David Wareing.
_______________________________________________
Sursound mailing list
Sursound@music.vt.edu
https://mail.music.vt.edu/mailman/listinfo/sursound
