On 01/17/2011 02:51 PM, Ronald C.F. Antony wrote:
Well, four cardioids at 90 deg. angles could be used to create both
two fig8 signals at 90deg from each other, plus an omni by summing
all four. So wouldn't that already be more or less account for
horizontal-only B-format?
it would, but so would three, so why waste one?
i've played around a bit with gnuplot (hope the attachment makes it
through): three cardioids at 120° sum up to a perfect omni, and also to
figures of eight (only one given here, for clarity.
(note i had to cheat a bit with the last two functions, because in polar
plotting, there's no concept of an "inverted polarity" lobe, instead r
is negative, which means that both halves of the eight are congruent on
the positive side).
--
Jörn Nettingsmeier
Lortzingstr. 11, 45128 Essen, Tel. +49 177 7937487
Meister für Veranstaltungstechnik (Bühne/Studio), Elektrofachkraft
Audio and event engineer - Ambisonic surround recordings
http://stackingdwarves.net
-------------- next part --------------
A non-text attachment was scrubbed...
Name: tricard.png
Type: image/png
Size: 64360 bytes
Desc: not available
URL:
<https://mail.music.vt.edu/mailman/private/sursound/attachments/20110117/9f4dfadc/attachment.png>
_______________________________________________
Sursound mailing list
Sursound@music.vt.edu
https://mail.music.vt.edu/mailman/listinfo/sursound
