Shure - Microphones - 522 Desktop Microphone

522 Desktop Microphone

The Model 522 is a dynamic base station microphone designed especially for radio communications, paging, and dispatching systems. Its cardioid (unidirectional) pickup pattern suppresses unwanted background noise -- the type of noise generated by other dispatchers working nearby, by ventilating equipment, or by office machines in the same area. It also eliminates or reduces feedback in public address paging applications.

522 with push-to-talk switch

A dual impedance desktop mic that suppresses unwanted background noise and reduces feedback in public address paging applications.

Dual impedance(19 to 300 ohms or High)
lmpedance change switch for convenient change-over
Finger-tip control bar (locking or non-locking action) to actuate microphone circuit and an external relay or control circuit
Long-life switch to satisfy rigorous requirements of communications and paging systems
Sturdy, high impact ARMO-DUR base and microphone case
Adjustable microphone height
Dependability -- under all operating conditions
Conversion kit available for Monitor/Transmit switching

Type

Dynamic

Frequency Response

60 to 11,000 Hz

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Polar Pattern

Cardioid (unidirectional) - uniform with frequency, symmetrical about axis

Impedance

Dual. Microphone rating impedance is 150 ohms (260 ohms actual) for connection to microphone inputs rated at 19 to 300 ohms and "High" for connection to high-impedance microphone inputs. Switch is in high-impedance position as supplied. To change impedance, see sections on lmpedance Selection and Connections in User Guide.

Sensitivity (AT 1,000 HZ):

	LOW	HIGH
Open Circuit Voltage*	-57.5 dB	-38.5 dB
(Ref. 1V/Pascal	(1.3 mV)	(12 mV)
*(1 Pa = 94 dB SPL)

Switch

Press-to-Talk Switch - locking or nonlocking operation to actuate microphone circuit and an external relay or control circuit. Microphone circuit normally shorted in both high and low impedance.

Impedance Selection Switch - double-pole double- throw slide switch in microphone base to provide either high- or low-impedance operation.

Cartridge Shock Mount