omnidirectional CTC spacing

thadman · 13th April 2009, 12:48 AM

Assume a circle of radius "r" with sources of equal amplitude spaced at equal intervals along its circumference. For a particular frequency (f) and distance (d), How close do the sources need to be in relation to each other to achieve an omnidirectional radiation pattern?

bjorno · 13th April 2009, 09:50 AM

Hi thadman,

(r/2) dictates the highest possible omni frequency with WR drivers i.e. f <= 344/ ((2xr)/4) if all are connected in phase but if Bessel configured, omni is achieved for all frequencies.
See:

http://www.diyaudio.com/forums/showt...25#post1686725

and

http://www.diyaudio.com/forums/showt...99#post1212599

b

13th April 2009, 12:48 AM	#1
thadman diyAudio Member Join Date: Dec 2005 Location: west lafayette	omnidirectional CTC spacing Assume a circle of radius "r" with sources of equal amplitude spaced at equal intervals along its circumference. For a particular frequency (f) and distance (d), How close do the sources need to be in relation to each other to achieve an omnidirectional radiation pattern? __________________ "It is a profound and necessary truth that the deep things in science are not found because they are useful; they are found because it was possible to find them."

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13th April 2009, 09:50 AM	#2
bjorno diyAudio Member Join Date: Mar 2005 Location: Jacobsmountain	Hi thadman, (r/2) dictates the highest possible omni frequency with WR drivers i.e. f <= 344/ ((2xr)/4) if all are connected in phase but if Bessel configured, omni is achieved for all frequencies. See: http://www.diyaudio.com/forums/showt...25#post1686725 and http://www.diyaudio.com/forums/showt...99#post1212599 b

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