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Bidirectional
Microphones. The
third type of microphone polarity pattern is the bidirectional (also known
as
the
Figure 8). A bidirectional mic will pick up sound from both the front and
the back, but not from all the way around. They don’t pick up sound from
the sides very well at all. Bidirectional mics are often used for miking
two instruments playing a part simultaneously, e.g. a horn section. When
a bidirectional mic is placed between two horn players with the side of
the mic perpendicular to the players, it will pick up sound from the horns
and very little else. Bidirectional mics are made in all three varieties
of microphone: dynamic, condenser, and ribbon.
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