Omnidirectional microphones respond equally to sounds from all directions. This microphone would be perfect for a performance from a band and a choir together.
Bidirectional microphones pick up sound equally from the front and rear. This microphone would be good to use in a lecture where the professor may ask questions and accept questions from the audience.
Cardioid microphones pick up sound only from one direction. This microphone would be good to use if a professor is giving a lecture that is being recorded and wants no questions or in a live concert so only the voice of the singer is amplified.
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