February 2016
Intermediate to advanced
216 pages
14h 38m
English
Content preview from Newnes Audio and Hi-Fi Engineer's Pocket Book, 3rd Edition
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47
Special types of microphone
Multi-pattern microphones Some capacitor units have two
diaphragms, one either side of the plate, facing to the front and
rear respectively. The basic pattern of each is a cardioid.
Polarising voltage to the rear can be switched off, leaving the
front to serve as a cardioid; or it can be switched on thereby
giving a combined omni pattern; its polarity can be reversed, so
forming positive front and negative rear lobes with cancellation
at the sides, i.e. a figure-eight pattern; or the reverse voltage
can be reduced, giving a small rear lobe and some side
cancellation, thus producing a hypercardioid response.
Zoo ...
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