TYPE 4189

½-inch free-field microphone, 6.3 Hz to 20 kHz, prepolarized

A general purpose microphone, designed for high-precision, free-field measurements where a 20 kHz microphone with high sensitivity is required.

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A general-purpose workhorse designed for high-precision, free-field measurements with high sensitivity. Our best-selling microphone for 15 years because it produces the best results in its class, and will keep doing so for decades to come, with both CCLD and classical preamplifiers.

Universally useful in almost every measurement scenario, it is especially well suited for battery operated equipment –  which is why it is fitted as standard to some of our world-leading sound level meters. Our best-seller for typical electro-acoustic measurements like loudspeaker and microphone measurements, because it has earned our customers' trust over many years. 

USER SCENARIOS

  • Precision sound measurement
  • Premium class sound level meters
  • Equipment complying with IEC 61672 class 1
Capacitance
14 pF
Diameter
½
Dynamic range
14.6 – 146 dB
Frequency range
6.3 – 20000 Hz
Inherent noise
14.6 dB A
Lower limiting frequency -3dB
4 Hz
Optimised
Free field
Polarization
Prepolarized
Polarization voltages
V
Pressure coefficient
-0.01 dB/kPa
Sensitivity
50 mV/Pa
Temperature coefficient
-0.006 db/ºC
Temperature range
-30 – 150 C
Venting
Rear
Weight
gram
Sound field
Free-field
Microphone type
Free field