SCM Measurement Microphones LisntenINC

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

Setup Diagram

Specification

- 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