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Loudspeaker dispersion-

Just looked at speaker details showing 90 degree horizontal; but only 5 degrees vertical. The dome and cones are all round. Why isn't the dispersion the same in both planes? Forgive my ignorance. I expect faster answers on this forum than trying to research this.
ptss
johnnyb53
3,510 posts
 
Just thinking out loud here .... Most tweeters have 1 inch domes or diaphram. At what frequency would that type of tweeter start to beam?
As the frequency approaches the diaphram diameter, the dispersion narrows. In the case of the 1" tweeter--barring some kind of waveguide--it's in full beam mode at about 13,500 Hz. See the wavelength caluculator to find the wavelength of any frequency.
c1ferrari
464 posts
 
Johnnyb53...thanks for that link -- most instructive website!
barry_e_cohen
83 posts
 
In most cases, speakers use drivers lined up vertically, the dispersion of the individual drivers doesn't vary, but the summed output will vary because the drivers are not concentric but positioned in a line and putting out different frequencies.
ptss OP
1,962 posts
 
I appreciate the summed output comments. However a 90/10 ratio is extreme. I hope some designer might "chime" in about this. (Are chimes directional?)
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