Jose,=0D
=0D
For frequencies below 1Khz, the efficiency factor would be very close to 1,=
with the right microphone. Our Pro Mono closely follows that curve. As fre=
quencies increase to about 10KHz, the efficiency drops closer to the 0.65 f=
igure or less. Many other factors come into play that determine actual gain=
, including microphone polar angle, shape and accuracy of the dish, focal l=
ength, accuracy of microphone placement, and other construction details. Th=
e gain figures look about right in your excel files using the 0.65 factor. =
You might want to change the factor at the lower frequencies. But, again, a=
lot of other factors contribute to gain and gain loss.=0D
=0D
Bruce Rutkoski=0D
Owner=0D
www.wildtronics.com=0D
=0D
=0D
---In <> wrote :=0D
=0D
Hello, Bruce you said the efficiency is 1 E=3D1. I have read in a paper f=
rom montana univercity I think that the average efficiency is 0,65 or so. S=
o I am using this number in my exell "Calculation parabolas 40,60,and100" Y=
ou can find this in Files. My parabolas are diy in hard and thick fiberglas=
s.=0D
In my paper I also have used the formulas from Sengaudio for Volume psicoa=
coustic, power sound intensity, and sound pressure voltage. Can you or some=
body recomend some alterations more realistic for my exell.=0D
Regards,=0D
Jose =0D
=0D
=0D
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