Hi Dave, Interesting - but we cannot comfortably tilt our heads on the side of our neck so that the horizontal plane becomes exactly equivelant vertical plane so even with these head movements I localisation directly above would be less accurate other directions (I assume - I would like to see some listening test results anyone ?). Either way we both agree putting more loudspeakers in a area we can localise worse there would not help. Ill raise this topic at the next meeting I have with the spatial audio group perhaps and see if I can get a more accurate picture of why the directly over head speakers were reduced. Sonic lab layout is here :
http://www.qub.ac.uk/sites/sarc/AboutUs/TheSARCBuildingandFacilities/TheSonicLab/SonicLabSpecs/Image,219299,en.gif as I say I think they had more directly overhead previously - though now I wonder if I got that wrong as there seems to be quite a few overhead still..... On 11 July 2013 12:40, Dave Malham <dave.mal...@york.ac.uk> wrote: > Hi Augustine, > Whilst it is generally said that that our angular acuity is better > on the horizontal plane, this way of expressing things is, frankly, a > snare and a delusion since it only applies when the head is upright. > Unless your listeners are restrained using something like the infamous > Green-Lee neck brace they will be able to move and change the > orientation of their heads so the direction of maximum acuity can be > essentially anywhere. So, if it is remotely possible, the rig should > be as homogeneous as possible in all directions. The other thing to > beware of is the difficulty of retaining equi-loudness in all panned > directions with uneven speaker rigs. > > Dave > > On 11 July 2013 10:15, Augustine Leudar <augustineleu...@gmail.com> wrote: > > Hi Eero, > > Al revers amigo. I dont know how it works with ambisonics and soundfield > > reconstruction but basically generally speaking your ears cant tell the > > difference if a speaker directly overhead is half a metre this way or the > > other - in effect your ears have lower resolution straight above so extra > > speakers are just wasted as you cant hear the difference anyway- > conversley > > where your ears have good localisation you need more speakers as your > ears > > are less easily fooled . This resulted in several speakers in the sonic > lab > > at the sonic arts research centre being removed overhead as listening > tests > > showed they were making little difference to the listener experience. > > Unless I was taught wrong - In which case Im all ears (pun not intended) > > > > On 11 July 2013 10:34, Eero Aro <eero....@dlc.fi> wrote: > > > >> I must confess that I don't know much about what you are discussing > >> about, but I think I read in one of the posts (that I already have > deleted) > >> that "there is no need to place a lot of speakers directly above, as our > >> localization is at it's worst in that direction". > >> > >> However, I have always thought that you need _more_ speakers (with > >> smaller angles) in those directions where the hearing localization of > >> phantom > >> images is not very good. You don't need as many speakers in those > >> directions > >> where the localization of phantom images is good. In front of the > listener > >> on the > >> horizontal plane two speakers at an angle of 60 degrees is good for most > >> people. > >> Elsewhere you need more. > >> > >> This of course applies to when the listener's head is not moving. > >> > >> Just ask Thomas Chen. > >> > >> Eero > >> > >> ______________________________**_________________ > >> Sursound mailing list > >> Sursound@music.vt.edu > >> https://mail.music.vt.edu/**mailman/listinfo/sursound< > https://mail.music.vt.edu/mailman/listinfo/sursound> > >> > > > > > > > > -- > > 07580951119 > > > > augustine.leudar.com > > -------------- next part -------------- > > An HTML attachment was scrubbed... > > URL: < > https://mail.music.vt.edu/mailman/private/sursound/attachments/20130711/c0d83a94/attachment.html > > > > _______________________________________________ > > Sursound mailing list > > Sursound@music.vt.edu > > https://mail.music.vt.edu/mailman/listinfo/sursound > > > > -- > -- > 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' > _______________________________________________ > Sursound mailing list > Sursound@music.vt.edu > https://mail.music.vt.edu/mailman/listinfo/sursound > -- 07580951119 augustine.leudar.com -------------- next part -------------- An HTML attachment was scrubbed... URL: <https://mail.music.vt.edu/mailman/private/sursound/attachments/20130711/5b494ef9/attachment.html> _______________________________________________ Sursound mailing list Sursound@music.vt.edu https://mail.music.vt.edu/mailman/listinfo/sursound
