Figure-of-8 microphones are constructed with positive polarity on
the front and negative polarity on the back. Positive pressure on the
front side of the ribbon produces a positive voltage on Pin-2, with
respect to Pin-3 on the output connector. The R88 consists of two
figure-of-8 transducers in a fixed Blumlein array.
8
A FIGURE-OF-8 MICROPHONE
A BLUMLEIN MICROPHONE
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The stereo R88 is a coincident microphone system. Coincident mic
techniques use two or more transducers placed closely together.
Coincident systems have good time coherence between their
channels which means that sounds from the same source all arrive
at close to the same time. One advantage of phase coherence is
that when channels are summed to mono, there is no comb-filtering
effect.
Blumlein is a type of coincident array technique that is configured
with two vertically figure-8 pattern microphones positioned
90-degrees to each other. A Blumlein array delivers stable, in-phase
