Haven't managed to follow the whole thread, but Dave Worrall's question about adaptation to others' pinnae: I think Fred Wightman and Doris Kistler did some on this, as did Hofman, Van Riswick and Van Opstal.
The interesting point is that, initially, when listening with others' ears, spatial performance is degraded, but over a period of a few weeks (I forget how long), performance comes right up to scratch and in a few rare cases, exceeds the performance previously demonstrated with listeners' own ears! The other point was that, after the experiment was over, listeners could go right back to listening with their own pinnae, so they'd actually learned a new set as well as, not in replacement of, the old set. I've no idea how many sets one could learn - could be an important funding bid! Cheers ppl Dr Peter Lennox School of Technology University of Derby, UK tel: 01332 593155 e: p.len...@derby.ac.uk -----Original Message----- From: sursound-boun...@music.vt.edu [mailto:sursound-boun...@music.vt.edu] On Behalf Of David Worrall Sent: 09 July 2011 17:20 To: Surround Sound discussion group Subject: Re: [Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound [Hello to all - It was good 2 C some of you at ICAD Budapest - and +ve 2 C a deal of activity in ambisonics for auditory design.] On 09/07/2011, at 6:40 AM, Fons Adriaensen wrote: > On Fri, Jul 08, 2011 at 02:06:37PM -0600, Bearcat M. Sandor wrote: > >> The ear canal is just a tube, so there's no >> directionality once the waves are in there. > Two words act as special alarms to me. In finance: "secret" and in phenomenology: "just". The ear canal is no less than "just" a tube than is a didgeridoo at the lips of an experienced player. One can certainly say "the ear canal is tubular" but it is not "just a tube" because, for eg, a) "tube" cannot be assumed to be regular, but arbitrarily complex, is arbitrarily flanged at both ends b) it has a transverse piece of sound-sensitive skin (the 'drum'), to which is attached other 'stuff' c) it is part of a head which has a brain in it that is also connected other sense receptors, including the vestibular labyrinth etc etc and that it has extensive experience using it/them to perceive events in external and internal environs, etc etc etc. as well as efference copy-being aware that a movement is one's own and not the world's. Related to (c), does anyone have any reports of empirical experiments on the brain's ability to learn/adapt to HRTF encoded signals encoded for 'foreign' ears? David > "Once they are in there". Which is why you can make things > work with headphones plus head motion tracking. > > When using speakers, the sound has to get 'in there' first. > And you are allowed to turn and otherwise move your head, > so even when e.g. seated you can (and will) explore the sound > field around it, and your brain will correlate your movements > with the changes of the sound entering your ears. So getting > the right sound 'in there' is not just a matter of recreating > the sound field at the two points where your ear canals would > be if your head were clamped into a vise. You have to create > something matching the field of a real source at least in the > near vicinity. And it turns out you can't do that without energy > arriving from more or less the right direction. > > Ciao, > > -- > FA > > _______________________________________________ > Sursound mailing list > Sursound@music.vt.edu > https://mail.music.vt.edu/mailman/listinfo/sursound _____________________________________________ Dr David Worrall Adjunct Research Fellow, Australian National University david.worr...@anu.edu.au Board Member, International Community for Auditory Display Regional Editor, Organised Sound (CUP) IT Projects, Music Council of Australia worrall.avatar.com.au sonification.com.au mca.org.au musicforum.org.au -------------- next part -------------- An HTML attachment was scrubbed... URL: <https://mail.music.vt.edu/mailman/private/sursound/attachments/20110710/a1727017/attachment.html> _______________________________________________ Sursound mailing list Sursound@music.vt.edu https://mail.music.vt.edu/mailman/listinfo/sursound _____________________________________________________________________ The University of Derby has a published policy regarding email and reserves the right to monitor email traffic. If you believe this email was sent to you in error, please notify the sender and delete this email. Please direct any concerns to info...@derby.ac.uk. The policy is available here: http://www.derby.ac.uk/LIS/Email-Policy _______________________________________________ Sursound mailing list Sursound@music.vt.edu https://mail.music.vt.edu/mailman/listinfo/sursound
