In a message dated 03/12/97  23:18:40, you write:

<< but how do you get the z information from the kunstkopf?
 This last question is on topic again, >>

Ah maybe too hasty in stating z
I think an additional point of measurement is required at a different
altidude to enable a phase reference to be established to compare to the
others.

Maybe not.
If the subject is directly in front of the head one then the signal would be
in phase in both ears regardless of distance or elevation. Head two being a
known distance from head 1 would be known phase delay between the with
respect to head one and the distance between the ears would give a second
known phase delay. thereby being able to compute x and y. Rase the subject
and then the phase difference between the ears on head two would change due
to the elevation.

No
There is an arc where all the signal (sound) paths are the same length thus
no phase change is apparent. You need Three Kunstkoph heads to establish z
and the third one should be elevated this gives a reference point and 5
comparison points but then you only need three points not 6 to establish xyz
most of the rest is trigonometery to establish the location of the scource.

Assume that the three sampleing points are 5M from each other on an
equalarital triangle. if the sound reaches each point at the same time then
the source is positioned at a point in the centre of the monitoring points or
at any elevation about that axis.
No you still need an additional point for reference
Three Kunstkoph's works because you can compare the phase difference between
the ears thereby you have six measureing points

(you need big fast computer to track Goat) maybe 2x GPS are better 1 fixed to
determine location and one on Goat in order to track

Sorry for thinking out loud but it would seem that I shot myself in foot just
there.......
Steve.....