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TYPE 4971

½-INCH PRESSURE-FIELD MICROPHONE, PREPOLARIZED, 5 HZ – 20 KHZ

Pressure-field microphone for precision coupler measurements, random incidence, and free-field measurements with 90°C incidence over a frequency range of 5 Hz to 20 kHz.

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TYPE 4971

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Type 4971 is a high temperature, CCLD pressure-field microphone set optimized for measurements in 125°C. The microphone is ideal for coupler measurements, random incidence measurements and free-field measurements with 90° incidence.

Being prepolarized, it can be used with CCLD input as well as classical input. It has wide frequency and dynamic range and is highly immune to changing environmental conditions.

  • Precision coupler measurements
  • Precision-grade sound level meters
  • General, random-incidence measurements
  • Free-field measurements with 90° incidence 
TYPE 4971
Standard IEC 61094
Sound field Pressure field
Polarization voltage 0V
Sensitivity 12.5 mV/Pa
Lower limiting frequency 5 Hz
Higher limiting frequency 20 kHz
Inherent noise 18.6 dB(A)
Upper limiting of dynamic range 162 dB
Diameter 1/2 inch
Venting Rear
Minimum Temperature -30 °C
Maximum Temperature 150 °C
Minimum Temperature -22 °F
Maximum Temperature 302 °F