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Directional microphone:

without parabolic reflector

Directional microphone:
Directional microphones such as used by, say, outdoor-recording specialists and bird-watchers, are invariably provided with a conspicuous parabolic reflector. This captures an almost parallel beam of sound waves and so reduces the angle of incidence of the microphone. The same action may be obtained in a completely different manner as described in this article.
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