i've heard similar results, especially when close to the array, from some inexpensive speakers we used for experiments. to do better, look for speakers with wide and smoothly dispersed HF response and avoid horn driven PA sort of speakers. Of course, easier said than done when you need 16 or more speakers - but if that's the problem, you can at least account for it and continue working.
jim On Wed, Sep 12, 2012 at 9:45 AM, Augustine Leudar <augustineleu...@gmail.com > wrote: > hmm that might be it - they are not the best speakers in the world ! > the effect is not noticable if you stand more than a metre or two away > from the array - thats why I thought it might be to do with > precedence... > > On 12/09/2012, jim moses <jmo...@brown.edu> wrote: > > the effect described could be an artifact of the speakers being used. if > > the speakers have have a high frequency bump at 0 degrees on axis, as > many > > do, you can get the sensation described where each speaker sort of pops > out > > of the array as you move in front of it. > > > > jim > > > > On Wed, Sep 12, 2012 at 9:07 AM, Fons Adriaensen > > <f...@linuxaudio.org>wrote: > > > >> On Wed, Sep 12, 2012 at 01:17:23PM +0100, Augustine Leudar wrote: > >> > >> > This is a question for those with knowledge of WFS. One of the > >> > properties of plane waves propagated with a single line array on a > >> > Wavefield synthesis system is that as you walk down the array the > >> > sound "follows" you appearing to emanate from the nearest loudspeaker > >> > . I was wondering if this was due to the precedence effect alone or if > >> > something else was going on as well ? > >> > >> It will be the nearest speaker only if the direction of the source > >> is orthogonal to the line array. > >> > >> What goes on is that the waves produced by the secondary sources > >> (speakers) combine into a wave as would be produced by a real > >> source in a particular direction and at a large distance. At > >> least within the bandwidth which does not produce spatial aliasing, > >> your ears/brain have no information at all to identify the speakers > >> as separate sources, so there is no precedence effect involved. > >> > >> > >> Ciao, > >> > >> -- > >> FA > >> > >> A world of exhaustive, reliable metadata would be an utopia. > >> It's also a pipe-dream, founded on self-delusion, nerd hubris > >> and hysterically inflated market opportunities. (Cory Doctorow) > >> > >> _______________________________________________ > >> Sursound mailing list > >> Sursound@music.vt.edu > >> https://mail.music.vt.edu/mailman/listinfo/sursound > >> > > > > > > > > -- > > Jim Moses > > Technical Director/Lecturer > > Brown University Music Department and M.E.M.E. (Multimedia and Electronic > > Music Experiments) > > -------------- next part -------------- > > An HTML attachment was scrubbed... > > URL: > > < > https://mail.music.vt.edu/mailman/private/sursound/attachments/20120912/e9e5b5ac/attachment.html > > > > _______________________________________________ > > Sursound mailing list > > Sursound@music.vt.edu > > https://mail.music.vt.edu/mailman/listinfo/sursound > > > _______________________________________________ > Sursound mailing list > Sursound@music.vt.edu > https://mail.music.vt.edu/mailman/listinfo/sursound > -- Jim Moses Technical Director/Lecturer Brown University Music Department and M.E.M.E. (Multimedia and Electronic Music Experiments) -------------- next part -------------- An HTML attachment was scrubbed... URL: <https://mail.music.vt.edu/mailman/private/sursound/attachments/20120912/7c8c8972/attachment.html> _______________________________________________ Sursound mailing list Sursound@music.vt.edu https://mail.music.vt.edu/mailman/listinfo/sursound
