cardioid microphone

electroacoustic device

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In electromechanical transducer: Linearity and directivity
…common directional microphone is the cardioid microphone, so called because, when the intensity response as a function of angle is plotted on a polar graph, the curve is heart-shaped. A cardioid microphone is useful for recording live performances, where it is desirable to eliminate audience noise. A shotgun microphone has…
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