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4939-B-002
4939-C-002 Connector

TYPE 4939

1/4" FREIFELDMIKROFON, EXT. POLARISIERT

Freifeldmikrofon für Messungen mit hohem Pegel und hoher Frequenz einem Frequenzbereich von 4 Hz bis 100 kHz.

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TYPE 4939

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Mit Edelstahlmembran und Schutzgitter ist das Mikrofone Typ 4939 so gebaut, dass es rauen Umgebungen standhält und für Hochtemperaturmessungen bis zu 150 °C (302 °F) verwendet werden kann.

Das Mikrofon benötigt eine externe Polarisationsspannung und muss daher mit einem klassischen Vorverstärker verwendet werden. Extern polarisierte Mikrofone können bei höheren Temperaturen verwendet werden, ohne dass sich die Messempfindlichkeit stark verändert.

  • Hochpegelmessungen
  • Hochfrequenzmessungen
  • Modellarbeit
Sprache keyboard_arrow_down
TEDS Microphones Data Sheets English
TEDS Microphones Data Sheets Japanese
FAMILY 4939
Standard IEC 61094
Sound field Free field
Polarization Classical
Sensitivity 3.5 mV/Pa, 4 mV/Pa
Lower frequency 4 Hz
Higher frequency 100 kHz
Lower dynamic range 35 dB
Higher dynamic range 164 dB
Diameter 1/4 inch
Venting Side
Minimum Temperature -20 °C
Maximum Temperature 80 °C
Minimum Temperature -4 °F
Maximum Temperature 176 °F
Output signal (connectivity) Passive

THIS MICROPHONE SET IS A 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 MICROPHONE-PREAMPLIFIER COMBINATION 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.

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