Without more details, it hard to speculate about problems, but I'll note that subtracting the outputs of two omnis to get a fig-8 response will result in a frequency response that rises 6dB/octave with a 90 degree phase shift relative to the sum. Unless that is corrected, these signals are not suitable for B-format.
On Mon, Jan 7, 2013 at 11:31 AM, Martin Leese < martin.le...@stanfordalumni.org> wrote: > Chenrilin wrote: > > > Hello, all > > I have designed an array of four microphones to get B-format signal. > ... > > Then I decoded > > them to get the > > feeding signal for four loudspeakers, and used HRTFs to get the left and > > right signal for headphone. > > > > 1. Furthermore, the experiment is made that a person was walking > > around the array and say > > something in an office. After processed by the method above, I find > there is > > a problem that > > the speech sounds like a person talking and moving around my head but > very > > near to my ears > > and head. What is the main reasons for this problem? > > What happens when you decode a walkaround > downloaded from Ambisonia.com? That is to > say, a walkaround recorded with somebody > else's mic. > > This would allow you to determine whether the > problem is with your decoder, or with the way > you calculate your B-Format components. > > Regards, > Martin > -- > Martin J Leese > E-mail: martin.leese stanfordalumni.org > Web: http://members.tripod.com/martin_leese/ > _______________________________________________ > Sursound mailing list > Sursound@music.vt.edu > https://mail.music.vt.edu/mailman/listinfo/sursound > -------------- next part -------------- An HTML attachment was scrubbed... URL: <https://mail.music.vt.edu/mailman/private/sursound/attachments/20130107/9be8ea4a/attachment.html> _______________________________________________ Sursound mailing list Sursound@music.vt.edu https://mail.music.vt.edu/mailman/listinfo/sursound
