[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
