TYPE 4966

½-inch free-field microphone, 5 Hz to 20 kHz, prepolarized

Designed for high‐precision, free‐field measurements where a microphone with high sensitivity is required.

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Type 4966 is a robust and stable free‐field microphone cartridge designed for high‐precision acoustic measurements. It 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.

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