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4939-B-002
4939-C-002 Connector

TYPE 4939

1/4" FREE-FIELD MICROPHONE, EXT. POLARIZED

Free-field microphone designed for high-level and high-frequency measurements over a frequency range of 4 Hz to 100 kHz.

Code Sensitivity
-4939-L-002- 3.5 mV/Pa
-4939-C-002- 3.5 mV/Pa
-4939-A-011- 4 mV/Pa

Using stainless steel diaphragm and protection grid, Type 4939 Microphone is built to withstand rough environments and can be used in high-temperature measurements up to 150°C (302°F). 

The microphone requires an external polarization voltage and must therefore be used with a classical preamplifier. Externally polarized microphones can be used at higher temperatures without severe changes in measurement sensitivity. 

  • High-level measurements
  • High-frequency measurements
  • Model work

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