SM2

The SM2 microphone is a close-talking unidirectional dynamic with a response from 50 to 15,000 Hz. Because of its noise reducing character, it discriminates in favor of close sounds and against distant sounds. As a result, it can be used even under extremely noisy conditions without loss or masking of the voice signal. The microphone boom pivots through 155 degrees so that the microphone can be correctly positioned at the corner of the mouth either from the left or right side. A locking thumbscrew prevents the microphone from slipping or twisting out of place.

• Close-talk microphone operation and unidirectional polar pattern for effective noise reduction
• Smooth, natural microphone voice frequency response
• Microphone can be worn on right or left side, boom pivots through 155 degrees
• Microphone boom length adjusts through 89 mm (31/2 in) range
• High sensitivity enclosed ear receivers block out room noise, enhance clarity of reception
• Self-adjusting, free-swiveling cushioned earpieces promote user comfort and lower fatigue during extended periods of use
• Cardioid dynamic

MICROPHONE

Type

Dynamic, Close-Talking

Frequency Response (at 8mm [5/16 in.]

50 to 15,000 Hz

Polar Pattern

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

Impedance

Microphone rating impedance is 150 ohms (200 ohms actual) for connection to microphone inputs rated at 19 to 300 ohms

Microphone Sensitivity (close-talked at 1,000 Hz)

Open Circuit Voltage: 47.0 dBV/Pa*(4.5 mV)

*1Pa = 94 dB SPL

Hum Sensitivity (typical)

38.4 dB equivalent SPL in 1 m0e field

Polarity

Positive pressure on diaphragm produces positive voltage on RED cable lead with respect to BLACK cable lead

RECEIVERS

Type

Dynamic

Frequency Response

100 to 8,000 Hz

Output Level (at each ear)

104.0 dB SPL with 1.4V at 1 kHz (1.0 mW into 6 cc cavity)

Polarity

Positive voltage on WHITE and/or YELLOW cable leads produces positive pressure at receiver