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Old July 20th, 2003, 07:50 PM   #1
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Purpose of round microphones?

Why are some microphones round?
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Old July 20th, 2003, 09:50 PM   #2
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What exactly do you mean by round?
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Old July 20th, 2003, 10:33 PM   #3
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Yeah that's kind of a hard quesiton to answer, but the bottom line is a microphone's shape and electronics affect its sound and pickup pattern. For instance mics that are long and thin (shotguns) have a narrow pickup pattern suitable for films and braodcast. Stage microphones have a heart-shaped pickup pattern (hence they're called cardioid) which is more suitable to being held under the chin as opposed to on a boom high above the actor.
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Old July 20th, 2003, 10:54 PM   #4
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I'm just wondering why some mics have a use a round ball to cover the mic vs. a different shape.

For example: Shure SM58 vs. Shure SM57 vs. MXL2003
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Old July 21st, 2003, 12:22 PM   #5
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In the case of the Shure SM58 and SM57, the round ball of the 58 acts
as a windscreen, and in addition, keeps the source (usually a voice w/ a 58)
from getting too close to the capsule which can caused a bass boost or
"proximity effect."
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Old July 21st, 2003, 12:40 PM   #6
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And the MXL2003 is a condenser microphone, so that affects the shape as well.
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Old July 21st, 2003, 12:48 PM   #7
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It's also used for well-rounded speakers.
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