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.

見積もり依頼

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.

USE SCENARIOS

  • Precision coupler measurements
  • Precision-grade sound level meters
  • General, random-incidence measurements
  • Free-field measurements with 90° incidence 

MICROPHONE IS ASSEMBLED USING:

Microphone Type 4971-H-041
Preamplifier Type 1706

Suitable for:

  • Random-incidence measurements
  • Free-field measurements with 90° incidence
  • Pressure-field measurements (5 Hz to 20 k Hz)
    • Close to hard reflective surfaces
    • Close to sound ports of audio devices
    • In flush mountings
Capacitance
14 pF
Diameter
1/2
Dyn. range
19 – 162 dB
Freq. range
5 – 20000 Hz
Inherent noise
18.6 dB A
Lower limiting frequency -3dB
1-3 Hz
Optimised
Pressure Field
Polarization
Prepolarized
Polarization voltages
V
Pressure coefficient
-0.0023 dB/kPa
Sensitivity
12.5 mV/Pa
Standards
IEC 61094-4 WS2P
Temperature coefficient
0.003 db/ºC
Temperature range
-30 – 150 C
Venting
Rear
Weight
gram
Sound field
Pressure-field
Microphone type
Pressure Field