TYPE 4966

1/2" Free-field Microphone, Prepolarized, 5 Hz - 20 kHz

Free-field microphone designed for high‐precision and high sensitivity measurements with a frequency response of 5 Hz to 20 kHz.

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A robust and stable free‐field microphone cartridge designed for high‐precision acoustic measurements. Type 4966 is developed and refined for measurements where a high sensitivity microphone with a full 20 kHz bandwidth is preferred and is optimized for use with the protection grid in place.

Microphone Type 4966 is prepolarized, so it is well suited for use in battery-operated equipment and environments with high humidity. 

USE SCENARIOS

  • Precision sound‐measurements
  • General purpose sound‐measurements
  • Electroacoustic measurements

Being prepolarized, Type 4966 can be used with both CCLD* and classical Brüel & Kjær preamplifiers. 

Capacitance
14 pF
Diameter
½"
Dynamic range
14.6 – 144 dB
Frequency range
5 – 20000 Hz
Inherent noise
14.6 dB A
Lower limiting frequency -3dB
3 Hz
Optimised
Free field
Polarization
Prepolarized
Polarization voltages
0 V
Pressure coefficient
-0.01 dB/kPa
Sensitivity
50 mV/Pa
Temperature coefficient
0.003 db/ºC
Temperature range
-30 – 150 C
Venting
Rear
Weight
gram
Sound field
Free-field
Input type
CCLD IEPE
Microphone type
Free field