Rob:
Interesting article. Of the techniques listed, the SAM, the
Surround-Atmo-Mikrofon (Surround-Ambience-Microphone) array is the closest
to what I'm trying to describe. Note that it is designed for ambient hall
recording and does not define a front and center. Although it uses
directional microphones, it would preserve binaural cues, which I think are
critical for what we're trying to accomplish as nature recordists.
My design is similar in that it would utilizes four mikes in a symmetrical
array, with elements ear-spaced. The big difference is that I would use omn=
i
mikes and barriers to make them directional, rather than cardioid mikes. I
would choose a design that firmly adheres to binaural psychoacoustical
principles, which means that the human brain will be given all the natural
information it normally uses to image sounds in space.
Lang
At 8:30 PM -0700 6/15/04, <> wrote:
> > my old idea of mounting 4 mics in a tetrahedral (pyramid shape)
>
>Kevin,
>
>Such a system was invented and patented by Michael Gerzon and Peter Craven
>back in the early 1970s, and the microphone is now known as the Soundfield
>microphone:
>http://www.soundfieldusa.com/
>The patent is no longer in force.
>
>It was demonstrated by Gerzon that a tetrahedral array of loudspeakers is
>NOT the best way to reproduce the signals. Although the microphone captur=
es
>information that includes height information, the height information is
>almost never reproduced (unfortunately). For practical reasons almost all
>reproduction systems involve a horizontal circle of loudspeakers, say 6 or
>8, or even more.
>
>I have used a Soundfield microphone, either the commercial one or one
>assembled out of individual microphones, to make numerous nature recording=
s
>and I find it very satisfactory for my purposes. But it is not without
>flaws. A great deal more information can be found at:
>http://www.ambisonic.net/
>and in the more than 100 technical papers on the subject published in the
>Journal of the Audio Engineering Society, and elsewhere.
>
>Eric Benjamin
Enjoyed this discussion. The below website has quite a few 5.1 micing
diagrams including the soundfield:
http://www.mtsu.edu/~dsmitche/rim456/Materials/tracking_5_1.html
Rob D.
=3D =3D =3D
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