SCM Measurement Microphones
Designed for Audio Measurement Applications
The SCM-3 and SCM 3A measurement microphones are robust, free-field microphones designed for the rigorous environment of a production line without compromising the accuracy, precision, and stability required for R&D. The same microphone cartridge is used in both models; the only difference is the length and weight. The SCM 3 is our standard microphone and the SCM 3A is a short version designed for production line use in confined spaces, and is a dimensional replacement for other popular microphone brands
The SCM-3 contains a 1/4” pre-polarized condenser cartridge with a gold diaphragm for sensitivity and stability. Its rugged stainless steel protection grid shields it from rough operator handling and the high humidity and temperatures of industrial environments to ensure long operating life. It offers excellent omni-directionality in both the near field and far field which makes it suitable for many different test configurations.
Each microphone is calibrated before it leaves our facility, and calibration correction curves are available on request in formats suitable for importing into SoundCheck® or other test systems.NIST and other traceable calibrations are available upon request.
* Note: The SCM-3 Measurement microphone has replaced the SCM-2
Cartridge Type: Prepolarized condenser element
Directional characteristics: Omni-directional
Frequency Response: 20 Hz — 20 kHz ± 2 dB
Nominal Sensitivity: 20 mV/Pa
Equivalent Noise Level: 23 dBA
Max SPL: 134 dB
Distortion: 123 dB SPL peak (<1% THD)
Powering: 5 to 50 Volts, supplied via R = (Vdc – 2.5V)/1mA
Operating Temperature range: −30 to +70°C (−22 to 158 °F)
Operating Humidity range: 0 to 100 % RH (without condensation)
Output impedance: 30 — 40 Ω (built- in preamplifier)
Cable drive capability: Up to 300 m (−0.2V at 20 kHz with 114 dB SPL)
Dimensions & weight: SCM-3 L: 9.2 cm (3.6 in) Ø: 7.0 mm (0.29 in), Weight: ~ 8.4 grams (0.3 oz); SCM-3A L: 3.4cm (1.3 in) Ø: 7.0 mm (0.28 in), Weight: ~ 3.8 grams (0.13 oz)
Cable (SCM-3 only): 1.8 m (5.9 ft)
Connector Adapter: 10-32 Microdot jack to 7-pin Lemo or BNC (specify at time of order)
Included Accessories: SCM 3: Case, Wind screen, microphone holder, extension cable and LEMO or BNC adapter; SCM 3A: None
On-Axis Frequency Response
SCM-3/3A microphones require a microdot jack minimum thread length of 0.23″ (5.8mm) and/or a jack body of 0.23″ (5.8mm) or less.
4002k SCM 3 – Lemo Connector
4002kb SCM 3 – BNC Connector
4002a SCM 3A
Optional SCM microphone Accessories
Note: SCM-3/3A microphones require a microdot jack minimum thread length of 0.23″ (5.8mm) and/or a jack body of 0.23″ (5.8mm) or less.
4006-5M Microphone cable, 5 meter (same as above)
4006-10M Microphone cable, 10 meter (same as above)
Pasternack.com: Female PE44361 to Male PE44351 (10-32 microdot connectors), 50 Ohm RG174A/U cable, cable length made to order.
4005 Listen SCM microphone holder for tripods, 1/4-20 thread type
4011 Calibrator adaptor for SCM-3 microphone
4013 LEMO to Microdot adapter
4014 BNC to Microdot adapter
5710 Microdot to XLR adapter for SCM-3 and RME Fireface 800 and UCX