From: Lang Elliott <>
> For all parabolic mike setups (monaural or stereo), the sounds arriving
> directly at the microphones will not be in phase with the same sounds
> reflected off the parabola back to the microphone. For on-axis sounds, it is
> assumed that on-axis reflected sound is so much louder than the direct
> on-axis sound that the interaction between the two is insignificant in
> practical terms.
I'm not so sure it's insignificant. True direct is much lower in
intensity than reflected. But we see graphs of measured parabolic
response that contain variations with frequency that would be produced
by the interference of direct on reflected.
My own early experiments lead me to believe that I got better clarity of
sound even in mono by blocking the direct path. Or using a directional
mic pointed at the dish.
Walt
________________________________________________________________________
________________________________________________________________________
"Microphones are not ears,
Loudspeakers are not birds,
A listening room is not nature."
Klas Strandberg
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