Hi Andrew,
Our Pro Mono Parabolic Microphone's gain starts at 200Hz. Below that, it wo=
uld pickup the same as a regular microphone. There is no reason why you wou=
ldn't be able to record frequencies of 20Hz, it just won't have gain. Our P=
ro Mono Parabolic Microphone doesn't suffer the bass dip, that all other pa=
rabolic microphones have, so the gain is quite linear. 400Hz would have twi=
ce the gain, 800Hz would have 4 times the gain, 1600Hz would have 8 times t=
he gain and so on, for a peak of around 28dB of gain at 10KHz, then it star=
ts dropping off at 18KHz. If you are interested in flattening the response,=
you can apply an EQ curve and apply it to help the gain at lower frequenci=
es. This EQ will raise the noise only slightly since it is being applied to=
a minimal bandwidth.
The atmospheric attenuation decreases with increases in humidity. So, in tr=
opical areas, you will see less attenuation in the higher frequencies than =
in desert conditions.
You have some nice recordings on your soundcloud. I enjoyed them. If I can =
help with any other questions, I would be happy to answer them.
Bruce Rutkoski
Owner
Wildtronics.com
---In <> wrote :
Hi Bruce,
I am interested your parabolics and I have a couple of questions. I record=
primates and owls which often have low frequency elements 50-200hz as well=
is high frequency elements 15khz-25khz. Can your parabolas record this ran=
ge or put it another way what is the lowest practical frequency that can be=
recorded with your system before you need to use huge dishes? Also in tro=
pical forests where humidity is high is the parabola effect lessened due to=
attenuation? You mention it in your articles.
Regards Andrew Perkin
Gear - PND661, Senn K6 system (struggles with humidity), EM172.
https://soundcloud.com/bwanakomba-1 https://soundcloud.com/bwanakomba-1
"While a picture is worth a thousand words, a
sound is worth a thousand pictures." R. Murray Schafer via Bernie Krause.
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