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University Sound US664A dynamic supercardioid microphone. The most common unidirectional microphone is a cardioid microphone, so named because the sensitivity pattern is "heart-shaped" (i.e. a cardioid). The cardioid family of microphones are commonly used as vocal or speech microphones since they are good at rejecting sounds from other directions.
A directional boundary microphone is a boundary microphone with a directional polar pattern such as cardioid or supercardioid. One method to create a directional boundary mic is to mount panels (hard surfaces) next to an omnidirectional mic capsule.
A cardioid can also be defined as the set of points of reflections of a fixed point on a circle through all tangents to the circle. [2] Cardioid generated by a rolling circle on a circle with the same radius. The name was coined by Giovanni Salvemini in 1741 [3] but the cardioid had been the subject of study decades beforehand. [4]
The result is a realistic stereo field that has reasonable compatibility with mono playback. Since the cardioid polar pattern rejects off-axis sound, less of the ambient room characteristics are picked up. This means the mics can be placed further away from the sound sources, resulting in a blend that may be more appealing.
The origin of SM57 may be traced to 1937, when Shure engineer Benjamin Bauer developed the first single-element directional microphone, the Unidyne, which had a cardioid pickup pattern. [1] In 1959, another Shure engineer, Ernie Seeler, advanced the art of microphone design significantly with the Unidyne III capsule which was later used in the ...
In radio communication, an omnidirectional antenna is a class of antenna which radiates equal radio power in all directions perpendicular to an axis (azimuthal directions), with power varying with angle to the axis (elevation angle), declining to zero on the axis.