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Type 4138-C-006
Connector 4138-C-006

TYPE 4138

1/8" PRESSURE-FIELD MICROPHONE, EXTERNALLY POLARIZED

Pressure-field microphone designed for very high-frequency measurements in confined spaces with a frequency range of 6 Hz to 140 kHz.

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TYPE 4138

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Type 4138 is designed for high-level and very high-frequency measurements and measurements in confined spaces. Being externally polarized, Type 4138 must be used with a classical preamplifier.

  • High-level and very high-frequency measurements
  • Applications which require a high degree of spatial resolution or where space is limited, for example, model testing
FAMILY 4138
Standard IEC 61094
Sound field Pressure field
Polarization Classical
Sensitivity 0.56 mV/Pa, 0.8 mV/Pa
Lower frequency 6.5 Hz
Higher frequency 140 kHz
Lower dynamic range 52.2 dB
Higher dynamic range 168 dB
Diameter 1/8 inch
Venting Side
Minimum Temperature -30 °C
Maximum Temperature 100 °C
Minimum Temperature -22 °F
Maximum Temperature 212 °F
Output signal (connectivity) Passive

THIS MICROPHONE IS A FACTORY-ASSEMBLED COMBINATION OF:

 

The unit is assembled in a clean-room environment and sealed together, after which it is assigned one single type number and one single serial number. This means that the combined unit has better precision and long-time stability, and is handled as one complete unit.

The unit also contains TEDS, which means that information about the serial number, type and sensitivity is stored within it.

THE BENEFITS OF USING A MICRPHONE-PREAMPLIFIER NCOMBINATION ARE:

  • Better stability and precision. Because the unit is assembled in clean-room facilities, there is no contamination.
  • Ease of use. Your analyzer front-end and software will automatically detect the type number, serial number and sensitivity because of the built-in TEDS technology. There is no need to enter this manually for every channel. 
  • Calibration integration. The TEDS technology means the microphone is automatically detected and identified by your data acquisition software, allowing it to be easily integrated with your calibration database.
  • Fewer errors. As your data acquisition software automatically knows the microphone type, serial number and sensitivity, manual inputs are greatly reduced – reducing human errors.