I had a look at the first half where they explained the theory but again it seemed to be entirely focussed on head shadowing as a nearfield cue - couldnt see anything about the curvature of the wavefront -..... very busy so didnt watch the second half - seemed the theory was in the first half.....
On 24 January 2018 at 14:01, John Merchant <john.merch...@mtsu.edu> wrote: > Tom Smurdon and Peter Stirling of Oculus presented research on near-field > HRTF for VR at last fall's OC4. The video of that talk is available here: > https://www.youtube.com/watch?v=l7mhXRB9PA4 > > ________________________________________ > From: Sursound <sursound-boun...@music.vt.edu> on behalf of > st...@mail.telepac.pt <st...@mail.telepac.pt> > Sent: Tuesday, January 23, 2018 8:12 PM > To: Surround Sound discussion group > Subject: Re: [Sursound] A submittal for a patent on Ambisonics? > > Citando Augustine Leudar <augustineleu...@gmail.com>: > > > Hi Jack, > > > > Aside from ILDs, ITDs, I also wondered if the pinna was able to > distinguish > > > > very close sound sources due to the fact the wavefront would be much > more > > > > curved almost spherical to the degree that it would be different > pressure > > > > present at different folds of the pinna (ie very close up sound slike > a > > > > mosquito) . I dont think theres been much done on that... > > Hi Augustine, > > I think "there has been done quite a lot on that"... 😉 > > (Reproduction of near-field audio sources) > > Beside of spherical waves (and their consequences) we should not > overlook that any high-frequency emitting (annoying) mosquito next to > your left ear would be heard much softer at your right ear, the head > shadow being even more relevant at close distances. > > BR > > Stefan > > P.S.: It is important to know about the "depth" of a mosquito audio > object relative to your head, both in VR and in real life... > > > On 23 January 2018 at 11:58, jack reynolds <jackreynolds...@gmail.com> > > > > wrote: > > > >> It looks like a method for binaural rendering with multiple distance > HRTFs. > >> > >> > >> > >> Ambisonics could be one of the inputs, but it seems to be aimed more at > >> > >> object based virtual reality, where the listener is more likely to come > >> > >> very close to an audio source. > >> > >> > >> > >> Most HRTFs are currently measured at 1m distance, so any objects closer > >> > >> than 1m are not currently rendered correctly. > >> > >> > >> > >> Far field HRTFs are closer to plane waves, whereas close up audio > objects > >> > >> emit more spherical waves, creating greater differences in interaural > time > >> > >> difference (ITD). > >> > >> > >> > >> Jack > >> > >> > >> > >> On 23 January 2018 at 11:18, Bearcat Şándor <bearcatsan...@gmail.com> > >> > >> wrote: > >> > >> > >> > >> I don't know a lot about patent law, but is this an attempt to tie up > our > >> > >> beloved Ambisonics? > >> > >> > >> > >> http://www.freepatentsonline.com/y2017/0366912.html > >> > >> > >> > >> .... > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: <https://mail.music.vt.edu/mailman/private/sursound/ > attachments/20180124/16ff3135/attachment.html> > _______________________________________________ > Sursound mailing list > Sursound@music.vt.edu > https://mail.music.vt.edu/mailman/listinfo/sursound - unsubscribe here, > edit account or options, view archives and so on. > _______________________________________________ > Sursound mailing list > Sursound@music.vt.edu > https://mail.music.vt.edu/mailman/listinfo/sursound - unsubscribe here, > edit account or options, view archives and so on. > -- Dr. Augustine Leudar Artistic Director Magik Door LTD Company Number : NI635217 Registered 63 Ballycoan rd, Belfast BT88LL -------------- next part -------------- An HTML attachment was scrubbed... URL: <https://mail.music.vt.edu/mailman/private/sursound/attachments/20180129/cb36a7fa/attachment.html> _______________________________________________ Sursound mailing list Sursound@music.vt.edu https://mail.music.vt.edu/mailman/listinfo/sursound - unsubscribe here, edit account or options, view archives and so on.
