Actually you can see from prior posts that I didn't even hear the far
right and far left locations until Walt pointed it out that the
highway seemed off to the side as well. This was on the city crows
that I posted. I checked and it was accurate at 15 degrees off. But
I also note that was one loud highway and would have been close to
impossible to record there without a dish.
That old example is still up as a 350kb download at:
http://home.attbi.com/~richpeet/mspcrows.mp3
If you want a better example I can record a car driveby at 200 yards,
that should maximize the effect.
--- In Marty Michener <>
wrote:
> At 09:11 AM 3/2/2003 -0500, I wrote:
> >As for Rich's circles and flyby response, I never noticed that.
Far right
> >was NOT louder in my right mic, but about equal. As the sound
angle got
> >closer to the center there was little detectable increase until
within 5 or
> >8 degrees, then BIG increase in the contralateral mic, then both
mics, then
> >the other mic, then fade out,
>
> I meant to point out again what Randy Little posted earlier - that
the size
> of this hole should in theory depend a lot on wavelength and mic
> diameter. For frequencies above 12 kHz (lambda one inch) the hole
will be
> much more audible with tiny mics. So everybody should try the rig
with
> their mic diaphragm sizes for themselves with a rich sound source
like pink
> noise. I used to aim my parabolas etc. with two pocket transistor
radios
> hung by string in trees and set to different stations. So dial you
own
> frequency mix.
>
> my best regards,
>
> Marty Michener
> MIST Software Associates PO Box 269, Hollis, NH 03049
>
> EnjoyBirds.com - Software that migrates with you.
http://www.EnjoyBirds.com
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