Shure 522 Cardioid Base Station Dynamic Microphone, 60 to 11000 Hz Frequency Response

The Shure 522 is a dynamic base-station microphone for radio communications, paging and dispatching systems. Its cardioid (unidirectional) pickup pattern suppresses unwanted background noise from nearby dispatchers, ventilating equipment, or office machines. It also can reduce feedback in public address paging applications.