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.
