Dave - yes - you could have made that point; you were the first person I observed to exhibit this 'training period' in that you could hear more detail in an ambisonic recording than most, because (I think) of prolonged exposure.
Training periods are known in psychology experimentation, and Kopco and Shinn-Cunningham did quite a bit on listening in different rooms, finding (amongst other things) that auditory spatial perception showed performance improvement of a period (couple of hours to reach asymptote, I think) and these improvements carried over to the next day, and, oddly to quite different locations in the same room. I suspect it's the same principle as the 'golden pinnae' experiments, where subjects can(after training period) achieve results with others' pinnae equivalent to their own - and, on occasions, better results! So a small range of well-chosen HRTFs ought to suffice for the majority of the population, providing there is opportunity for appropriate training periods. Isn't Brian Katz doing something on this? cheers (get back to my marking, and stop prevaricating) Dr. Peter Lennox Senior Fellow of the Higher Education Academy Senior Lecturer in Perception College of Arts University of Derby Tel: 01332 593155 ________________________________________ From: Sursound [sursound-boun...@music.vt.edu] On Behalf Of Dave Malham [dave.mal...@york.ac.uk] Sent: 25 January 2016 13:04 To: ch...@chriswoolf.co.uk; Surround Sound discussion group Subject: Re: [Sursound] How to derive a good "universal" HRTF data set? Chris makes some very good points, ones that I wish I'd made myself! We must be continuously recalibrating our hearing to be able to deal with all the effects Chris mentions otherwise the conflict between the physical sense of hearing and our internal perceptual models would become too excessive. Dave On 25 January 2016 at 12:40, Chris <ch...@chriswoolf.co.uk> wrote: > Maybe a silly question... > > But how much work has been done on the self-consistency of HRTFs? I'm > aware that ear-wax, colds, which way round I sleep, etc can affect the > level and HF response of one ear to another. And clothing, haircuts etc > must significantly change the acoustic signal round our heads. > > So are measured HRTFs consistent over time? Or do we re-calibrate > ourselves on a continuous basis? > > If the latter is true, then I can see that a generic HRTF could work if we > were given some method (and time for) calibration. > > Chris Woolf > > On 25-Jan-16 11:45, Bo-Erik Sandholm wrote: > >> Just a short note, my wish list for what I think. could be a good way of >> doing binaural coding is to use these parameters: >> >> - the distance between the ears (head size) is the most import factor so >> maybe 5 sizes to choose from. ( I have a larger inter ear distance than >> the >> norm) >> >> - use only simple generic compensation for ear shape above ~4kHz. >> >> - the shoulder reflection controlled by head tracking data, the simplest >> way is to assume the listener is stationary and only turns his head. Could >> this be implemented to be a parametric controlled filter set? >> >> Can anyone create a binaural encoding using this? >> >> I think the shoulder compensation is something that have not been done. >> As far as I know all binaural encodings are done using data sets with a >> fixed head and shoulder position. >> >> Best regards >> Bo-Erik Sandholm >> Stockholm >> -------------- next part -------------- >> An HTML attachment was scrubbed... >> URL: < >> https://mail.music.vt.edu/mailman/private/sursound/attachments/20160125/039046f6/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. >> >> >> > > --- > This email has been checked for viruses by Avast antivirus software. > https://www.avast.com/antivirus > > _______________________________________________ > 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. > -- As of 1st October 2012, I have retired from the University. These are my own views and may or may not be shared by the University Dave Malham Honorary Fellow, Department of Music The University of York York YO10 5DD UK 'Ambisonics - Component Imaging for Audio' -------------- next part -------------- An HTML attachment was scrubbed... URL: <https://mail.music.vt.edu/mailman/private/sursound/attachments/20160125/8fecc5ce/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. The University of Derby has a published policy regarding email and reserves the right to monitor email traffic. If you believe this was sent to you in error, please select unsubscribe. 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