Another term used to describe directional microphone's pickup pattern is

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Cardioid pickup pattern describes directional microphones that are more sensitive to sound sources in front of the microphone and less sensitive to sounds coming from behind the microphone. This makes them useful in noisy environments where there is a lot of background noise that needs to be rejected. Omnidirectional microphones pick up sounds from all directions equally, flat microphones have a very linear response with no emphasis on any particular frequency, and circular microphones do not exist as a specific pickup pattern.

Another Term Used to Describe Directional Microphone's Pickup Pattern Is