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Familie 4939

1/4-Zoll-Freifeldmikrofon, extern POLARISIERT

Freifeldmikrofon für Messungen bei hohem Pegel und hohen Frequenzen über einen Frequenzbereich von 4 Hz bis 100 kHz.

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Familie 4939

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Durch die Verwendung einer Membran aus nichtrostendem Stahl und eines Schutzgitters ist das Mikrofon Typ 4939 für raue Umgebungen ausgelegt und kann bei Hochtemperaturmessungen von bis zu 150 °C eingesetzt werden.

Das Mikrofon benötigt eine externe Polarisationsspannung und muss daher mit einem klassischen Vorverstärker verwendet werden. Extern polarisierte Mikrofone können bei höheren Temperaturen ohne wesentliche Einbußen der Messempfindlichkeit eingesetzt werden.

  • Messungen bei hohem Pegel
  • Messungen bei hohen Frequenzen
  • Modellarbeit
Sprache keyboard_arrow_down
TEDS Microphones Datenblätter English
TEDS Microphones Datenblätter 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.