Hi Folks
I recently made a stereo parabola. I based it on Lang Elliott's
design that was posted a couple years ago on the list. I did=20
change the microphone installation and the handle from Langs design
however. I made mine with two pvc tubes in the middle so the
microphones could be inserted and removed easily and used
elsewhere. I also made the handle differently and that is where the
problem lies. I am using a wooden handle which I have attached to
the back of the PVC mount with allthread. What that effectively
does is transfer sounds of my hand movement and creaking wrist to
the microphones. I wrapped the handle with rubber padding made for
a tennis racquet, tried a soft glove and I'm now using 75 or 150 Hz
bass cut on my recorder. It all helps but I really have to
concentrate on not moving to get the quality recording I'm looking
for.=20
The recordings I've made so far are really nice. A lot of depth and
three dimentional feel to the recording.=20
I did not put a barrier between the two microphones. There was an
excellent discussion on the list a couple years ago about parabolas
and how stereo works. So, I was prepared but found I had a nice
stereo field without a barrier. I did make one but I don't think it
is necessary.
I think the solution would be a type of foam wrap which I have been
unable to find or re-do my handle with something that won't transmit
sound so well. Any ideas? Thanks, Mark
=20
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