Hi David.
> I don't see how this can fail to generate a stereo image. If you keep
> shrinking it you will finish up with a Jecklin disk which has similar
> directional properties.
The Jecklin Disk is larger, not smaller. I believe Jecklin's original design
was modeled from a LP record as a baffle and head spaced (165mm) mics. His
later update specifies a 35cm disk with 36cm mic spacing.
See:
http://www.josephson.com/tn5.html
and
http://www.mdw.ac.at/I101/iea/tm/scripts/jecklin/tt03mikrofon.pdf
I have only tried the original head spaced scheme.
> has anyone actually measured the time delay on a SASS from say 60
> degrees? 175mm path length difference gives about 60ms. Our ears can
> distingush about 1ms.
I have not, but that does bring up the interesting characteristic of a baffled
array where the effectual path length between capsules changes depending on
angle to the sound source and frequency.
John Hartog
rockscallop.org
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