Jecklin Disk
Stereo recordings use two (or more) microphones. There are many ways to
position two microphones to get a realistic stereo image. Entire books
have been written about the many different mic positioning techniques
for stereo.
One of the more recent developments is Juerg Jecklin's "Optimal Stereo
Signal" technique. This technique uses two omnidirectional microphones
spaced 160mm (approximately 6 inches) apart, separated by an
acoustically absorbent flat disc that is 300mm (approximately 12 inches)
across. This microphone mount has come to be called the "Jecklin Disk."
The folks at Josephson Engineering have a very nice technical note with
excerpts from Jecklin's report describing the Jecklin Disk and its usage.
Schneider Disk
A variant on the Jecklin Disk is the Schneider Disk. The Schneider Disk
adds a foam covered sphere to the center of the disk, better mimicing
the human head's absorption characteristics.
How do you choose between them? Both provide excellent stereo imaging
when played back over speakers. The Schneider Disk provides a slightly
better approximation of a binaural recording when played back over
headphones.
The microphone clips on both Disks are designed to accept microphones
having a 21mm diameter. They will accept slightly larger microphones
too.
CSB microphones and accessories have been sold to customers all over the
world, including the United States, Canada, Brazil, Japan, Singapore,
Korea, Hong Kong, Australia, New Zealand, France, Belgium, Germany,
Austria, England, Scotland, Norway, Ireland, Sweden, Finland, Poland,
Serbia, South Africa and many others.
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