SCM Measurement Microphones
Designed for Audio Measurement Applications
SCM measurement microphones are rugged and reliable for all audio measurement environments.
Overview
The SCM-4 and SCM-4A 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-4 is our standard microphone and the SCM-4A is a short version designed for production line use in confined spaces, and is a dimensional replacement for other popular microphone brands.
The SCM-4 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-4 is the successor to our popular SCM-3 and features improved dynamic range (THD), but is otherwise identical in performance and dimensions to the SCM-3. It handles SPL up to 126dB with <1% THD, an enhancement over the 123dB offered by the SCM-3.
Setup Diagram
Loudspeaker Test Setup Using SCM Microphone
Specifications
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: 126 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-4 L: 9.2 cm (3.6 in) Ø: 7.0 mm (0.29 in), Weight: ~ 8.4 grams (0.3 oz); SCM-4A L: 3.4cm (1.3 in) Ø: 7.0 mm (0.28 in), Weight: ~ 3.8 grams (0.13 oz)
Cable (SCM-4 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 4: Case, Wind screen, microphone holder, extension cable and LEMO or BNC adapter; SCM 4A: None
Directional Response
On-Axis Frequency Response
Cable Compatibility
SCM-4/4A 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.
Ordering Information
Measurement Microphones
Part #
4012 Listen SCM-4 microphone only (no cables)
4012k Listen SCM-4 microphone kit, includes 1.8m microdot cable, LEMO adapter, holder, case
4012kb Listen SCM-4 microphone kit, includes 1.8m microdot cable, BNC adapter, holder, case
4012s Listen SCM-3A microphone, short version, no cables included
4012sl SCM-4A microphone kit, includes 1.8m microdot cable, LEMO adapter, holder, case
4012sc SCM-4A microphone kit, includes 1.8m microdot cable, BNC adapter, holder, case
Optional SCM microphone Accessories
Note: SCM-4/4A 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.
Part #
4006T
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
Complementary Products
SoundCheck audio test and measurement software
SCM Measurement microphones
AudioConnect and AudioConnect 4×4 audio interfaces
SCAmp audio test amplifier
Download PDF data sheet
