The setup for the recording was basically the same as one of Curt
Olson's experiments --- Shure 183's (omnis) attached to opposite sides
of parallel 1 x 3 boards.
(I wired the 2 microphones into a single t-r-s miniplug with the red
wires going to the tip and ring and every thing else going to the
ground. So I guess the connections could be bad, but I don't see what
could be crossed.)
If there were no boards and the mics were perfectly omni's at all
frequencies there would be no front/back information since
interchanging the microphones, switching channels, and rotating the
setup 180 degress would all produce exactly the same effect. So it
seems to me.
Departures from symmetric polar pattern at even some frequencies would
mean that there might be front/back information in the recording and I
could believe that sticking the suckers on boards would increase this
even more, though I haven't convinced myself that this is the case.
Am I correct that it is also impossible to make a front/back
assignment to a stationary souce that is located on the mid-plane?
If the mp3 compression is messing things up, should I post a .wav file?
Thanks,
Steve P
In "Richard Humphries" <>
wrote:
>
> --- In "Steve Pelikan" <pelikan@>
> wrote:
> >
> > Friends: I'd appreciate any ideas you can give me about a matter that
> > (I hope) will improve my understanding of stereo.
> >
> > In the mp3 clip http://homepages.uc.edu/~pelikas/goose.mp3
> > you'll hear a Canada Goose flying from right to left. To me, when I
> > listen to the recording with headphones, it sounds like the goose is
> > flying behind me (rather than in front of me --- where it might be
> > seen, for example).
> >
> > Am I nuts in this perception? or arbitrary? Can anyone agree/disagree
> > with the effect?
> >
> > When I reverse the channels (switch the headphones around left for
> > right) it STILL sounds like the goose passes behind me. So it seems
> > that switching left for right is a "flip" in a vertical mirror rather
> > than a "rotation".
> >
> > What kind of information conveys/creates the "front/back" effect?
> >
> > Finally, or to be less theoretical: When the recording was made, the
> > goose flew in front of me. What could I have done wrong?
> >
> > Thanks ever so much for any hints to reduce by confusion....
> >
> > Steve P
> >
>
>
> The recording has slightly more anti-phase information in it than in
> phase. Is it possible that you have a wire crossed in your recording
> setup?
>
> -Richard
>
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