--- In "John Hartog"
<> wrote:
Your thoughts, pictures, and recordings
> surrounding your innovations are certainly intriguing. I can't wait to
> hear some field tests of your jekdish.
Hi John
I've not had chance to get out today to field test the parajeck.
However, tonight I have been able to do a clock test to investigate
its stereo capability. The set up for the test is shown in the photo
http://ad2004.hku.nl/naturesound/TomR/Wide%20Stage%20Parabolic/Test%20Jig.j=
pg
The clock can be seen fastened to the wooden post at the correct
height from the floor to line up with the centre of the parabola. The
post was placed on the sticky paper pads carefully placed on the
carpet to ensure correct clock positioning.
I moved the post/clock around the parabola in a anticlockwise
direction from 4 through 12 to 8. I paused at each clock position for
about 15 seconds. The following comprises nine contiguous 10 second
bits (one for each clock position) from 4 o'clock through 8 o'clock.
http://ad2004.hku.nl/naturesound/TomR/Wide%20Stage%20Parabolic/001-ParaJeck=
%20Clock%20Test%20Edited%20mp3.mp3
Using headphones it is possible to get a good stereo positioning (to
my ears at least) and the increase in amplitude at 12 o'clock, due to
the parabolic reflector, is nicely demonstrated. I'm reasonably
pleased with this for a start (but apologies for various body noises
and odd, regular pneumatic drill type noise - the recording was done a
midnight).
The following longish file is the complete take as it came out of the
minidisc. Only worth listening to as a check on the methodology
http://ad2004.hku.nl/naturesound/TomR/Wide%20Stage%20Parabolic/001-ParaJeck=
%20Clock%20Test%20mp3.mp3
The minidisc was operated with high mic sensitivity, manual volume
setting of 23.
Cheers
Tom Robinson
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