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In the Forum: Horn-Loaded Speakers
In the Thread: Macondo's Axioms: Horn-loaded acoustic systems
Post Subject: Hi!Posted by be on: 4/4/2008
"I do not
think that effect you describe has anything to do with demand of horns
have strictly parallel axis. I also came across to some situations
where the extremely indirect sound was superbly interesting but it is I
feel is very different subject and has very different underlying
reasons."
Maybe.
"My
presumption is that with non-parallel case the different frequencies
get time-aligned at different distances, something to what we in
photography (my first trade) was called chromatic aberration."
This is wrong.
Chromatic aberration in lenses is caused by that the speed of light changes as a function of the frequency (colour) of the light in the glas. This is called dispersion.
In case of sound propagation of sound in air, there is no dispersion, this means the speed of sound is the same for all frequencies.
There is no analogy to chromatic aberration in acoustics of air.
Regards
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