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Microphone Cartridges

Brüel & Kjær microphone cartridges are suited for a wide range of measurement applications. Four types of microphones define the sound field and adaptability for specific environments, industries, and measurement conditions, and are referred to as free-field, pressure-field, diffuse-field, and special microphones. B&K microphone cartridges are supplied in 1 inch, 1/2 inch, 1/4 inch or 1/8 inch diameter size, and require a microphone preamplifier.

SELECT YOUR Microphone

Hz
dB
mV/Pa
  • 1/8-inch pressure-field microphone Type 4138

    Type 4138

    1/8" Pressure-field Microphone, Externally Polarized

    Pressure-field microphone designed for very high-frequency measurements in confined spaces with a frequency range of 6.5 Hz to 140 kHz.
    • Dyn. range : 43 – 168 dB
    • Freq. range : 6.5 – 140000 Hz
    • Polarization : Ext polarized
    • Sensitivity : 1 mV/Pa
    • Standards :
  • 1-inch pressure-field microphone Type 4144

    TYPE 4144

    1-inch Pressure-field Microphone, Externally Polarized

    Pressure-field microphone exceptionally suited for coupler and other laboratory type measurements over a frequency range of 2.6 Hz To 8 kHz.
    • Dyn. range : 11 – 146 dB
    • Freq. range : – Hz
    • Polarization : Ext polarized
    • Sensitivity : mV/Pa
    • Standards :
  • 1-inch free-field microphone Type 4145

    TYPE 4145

    1" Free-field Microphone, Ext. Polarized

    Free-field microphone for low-level, laboratory, and sound pressure measurements (IEC 61672 Class 1) over a frequency range of 2.6 Hz To 18 kHz.

    • Dyn. range : 10.2 – 146 dB
    • Freq. range : – Hz
    • Polarization : Ext polarized
    • Sensitivity : mV/Pa
    • Standards :
  • 1-inch laboratory standard microphone Type 4160

    TYPE 4160

    1" Laboratory Standard Microphone

    Laboratory Standard Microphone Type 4160 is specifically built for extreme stability over a frequency range of 2 Hz To 8 kHz. The standard microphone is perfectly suited as laboratory reference microphone.
    • Dyn. range : 10 – 146 dB
    • Freq. range : 2 – 8000 Hz
    • Polarization : Ext polarized
    • Sensitivity : 47 mV/Pa
    • Standards : IEC 61094-1 LS1P
  • ½-inch free-field microphone Type 4176

    TYPE 4176

    ½-inch Free-field Microphone, Prepolarized, 6.5 Hz – 12.5 kHz

    Free-field microphone for sound level meter measurements (IEC61672 class 1 and ANSI S 1.4 Type 1) over a frequency response of 6.5 Hz To 12.5 kHz.
    • Dyn. range : 14 – 142 dB
    • Freq. range : 6.5 – 12500 Hz
    • Polarization : Prepolarized
    • Sensitivity : 50 mV/Pa
    • Standards :
  • ½-inch laboratory standard microphone Type 4180

    TYPE 4180

    ½-inch Laboratory Standard Microphones, Externally Polarized

    Laboratory Standard Microphone designed for use as a reference microphone, delivering extreme stability over a frequency range of 1Hz to 20 kHz.
    • Dyn. range : 18 – 160 dB
    • Freq. range : 1 – 20000 Hz
    • Polarization : Ext polarized
    • Sensitivity : 12.5 mV/Pa
    • Standards : IEC 61094-1 LS2P
  • ½-inch free-field microphone Type 4188

    TYPE 4188

    ½-inch Free-field Microphone, Prepolarized

    Free-field microphone for measurements in transport-noise measurements, architectural acoustics and electroacoustics over a frequency range of 8 Hz to 12.5 kHz.
    • Dyn. range : 15.8 – 146 dB
    • Freq. range : 8 – 12500 Hz
    • Polarization : Prepolarized
    • Sensitivity : 31.6 mV/Pa
    • Standards :
  • ½-inch free-field microphone Type 4189

    TYPE 4189

    ½" Prepolarized Free-field Microphone

    Type 4189 is designed for high-precision, free-field measurements where a microphone with high sensitivity is required. Being prepolarized, the microphone can be used with both DeltaTron and classical preamplifiers.
    • Dyn. range : 14.6 – 146 dB
    • Freq. range : 6.3 – 20000 Hz
    • Polarization : Prepolarized
    • Sensitivity : 50 mV/Pa
    • Standards : IEC 61094-4 WS2F
  • ½-inch free-field microphone Type 4190

    TYPE 4190

    ½-inch Free-field Microphone, Externally Polarized, 6.3 Hz – 20 kHz

    Microphone designed for high-precision free-field measurements from 6.3 Hz to 20 kHz with high sensitivity.<br>.
    • Dyn. range : 14.6 – 146 dB
    • Freq. range : 6.3 – 20000 Hz
    • Polarization : Ext polarized
    • Sensitivity : 50 mV/Pa
    • Standards : IEC 61094-4 WS2F
  • ½-inch free-field microphone Type 4191

    Type 4191

    ½-inch Free-field Microphone, Externally Polarized, 3.15 Hz – 40 kHz

    Free-field microphone for high-precision, free-field measurements with a wide frequency range/bandwidth of 3.15 Hz to 40 kHz.
    • Dyn. range : 20 – 162 dB
    • Freq. range : 3.15 – 40000 Hz
    • Polarization : Ext polarized
    • Sensitivity : 12.5 mV/Pa
    • Standards : IEC 61094-4 WS2F
  • ½-inch pressure-field microphone Type 4192

    TYPE 4192

    ½-inch Pressure-field Microphone, Externally Polarized

    Pressure-field microphone designed for high-precision coupler measurements or ANSI noise measurement over a frequency range of 3.15 Hz to 20 kHz.
    • Dyn. range : 19 – 162 dB
    • Freq. range : 3.15 – 20000 Hz
    • Polarization : Ext polarized
    • Sensitivity : 12.5 mV/Pa
    • Standards : IEC 61094-4 WS2P
  • BK-type-4192-T

    TYPE 4192-T

    ½-inch Transfer Standard Microphone, Ext. Polarized

    Transfer standard microphone designed for use in laboratory applications requirring a frequency range of 3.15 Hz to 20 kHz.
    • Dyn. range : 19 – 162 dB
    • Freq. range : 3.15 – 20000 Hz
    • Polarization : Ext polarized
    • Sensitivity : 12.5 mV/Pa
    • Standards :
  • ½

    TYPE 4193

    1/2" low frequency Pressure field Microphone

    Low frequency microphone Type 4193 is designed for infrasound measurements over a frequency range of 0.07 Hz to 20 kHz. The microphone is externally polarized and must be used with a classical preamplifier.<br>
    • Dyn. range : 19 – 162 dB
    • Freq. range : 0.07 – 20000 Hz
    • Polarization : Ext polarized
    • Sensitivity : 12.5 mV/Pa
    • Standards : IEC 61094-4 WS2P
  • 4938

    TYPE 4938

    1/4-inch Pressure-field Microphone, Externally Polarized

    Pressure-field microphone for high-level and high-frequency measurements over a frequency range of 4 Hz to 70 kHz.
    • Dyn. range : 30 – 172 dB
    • Freq. range : 4 – 70000 Hz
    • Polarization : Ext polarized
    • Sensitivity : 1.6 mV/Pa
    • Standards : IEC 61094-4 WS3P
  • ¼-inch free-field microphone Type 4939

    TYPE 4939

    1/4" Free-field Microphone, Ext. Polarized

    Free-field microphone designed for high-level and high-frequency measurements over a frequency range of 4 Hz to 100 kHz.
    • Dyn. range : 28 – 164 dB
    • Freq. range : 4 – 100000 Hz
    • Polarization : Ext polarized
    • Sensitivity : 4 mV/Pa
    • Standards : IEC 61094-4 WS3F
  • Prepolarized Free-Field 1/2-inch Microphone - Type 4940

    TYPE 4940

    ½-inch Free-field Microphone, Prepolarized, IEC 60651 Type 1

    Free-field microphone for outdoor and industrial environment measurements (IEC 60651 Type 1) and frequency analysis measurements from 2 Hz to 20 kHz.
    • Dyn. range : 14.6 – 146 dB
    • Freq. range : 6.3 – 20000 Hz
    • Polarization : Prepolarized
    • Sensitivity : 50 mV/Pa
    • Standards :
  • 1/4

    TYPE 4941

    High-level Sound Pressure Microphone, Ext. Polarized

    High Sound Pressure Microphone Type 4941 is designed for extremely high-level measurements such as gunshot, fireworks and rockets over the frequnency range of  4Hz to 20 kHz.
    • Dyn. range : 59 – 184 dB
    • Freq. range : 4 – 20000 Hz
    • Polarization : Ext polarized
    • Sensitivity : 0.09 mV/Pa
    • Standards :
  • ½-inch diffuse-field microphone Type 4942

    TYPE 4942

    ½-inch Diffuse-field Microphone, Prepolarized

    Diffuse-field microphone cartridge specifically designed for random-incidence (diffuse-field) measurements over 6 Hz TO 16 kHz, and provides noise measurement in accordance with ANSI standards.
    • Dyn. range : 14.6 – 146 dB
    • Freq. range : 6.3 – 16000 Hz
    • Polarization : Prepolarized
    • Sensitivity : 50 mV/Pa
    • Standards :
  • ½-inch diffuse-field microphone Type 4943

    TYPE 4943

    ½" Diffuse-field / Random Incidence Microphone

    Externally polarized, diffuse-field microphone designed for random-incidence measurements over 3.15 Hz to 10 kHz, and is approved for noise measurements in accordance with ANSI standards.
    • Dyn. range : 15.5 – 148 dB
    • Freq. range : 3.15 – 10000 Hz
    • Polarization : Ext polarized
    • Sensitivity : 50 mV/Pa
    • Standards :
  • ¼-inch pressure-field microphone Type 4944

    TYPE 4944

    1/4" Pressure-field Microphone, Prepolarized

    Type 4944 is a ¼-inch Prepolarized Pressure-field Microphone designed for high-level and high-frequency measurements over a frequency range of 4 Hz To 70 kHz.
    • Dyn. range : 30 – 170 dB
    • Freq. range : 4 – 70000 Hz
    • Polarization : Prepolarized
    • Sensitivity : 0.9 mV/Pa
    • Standards : IEC 61094-4 WS3P
  • ½-inch pressure-field microphone Type 4947

    TYPE 4947

    ½-inch Pressure-field Microphone, Prepolarized, 8 Hz – 10 kHz

    Pressure-field microphone designed for coupler measurements in connection with telephone and hearing aid testing over a frequency range of 8 Hz To 10 kHz.
    • Dyn. range : 17.5 – 160 dB
    • Freq. range : 8 – 10000 Hz
    • Polarization : Prepolarized
    • Sensitivity : 12.5 mV/Pa
    • Standards :
  • ½-inch free-field microphone Type 4950

    TYPE 4950

    ½-inch Free-field Microphone, Prepolarized (IEC 6172 Class 1)

    Free-field microphone designed for accurate sound measurements (IEC 61672 Class 1 and ANSI S 1.4 Type 1) over a frequency range of 6.5 Hz to 16 kHz.
    • Dyn. range : 15 – 142 dB
    • Freq. range : 6.5 – 16000 Hz
    • Polarization : Prepolarized
    • Sensitivity : 50 mV/Pa
    • Standards :
  • ½-inch pressure-field microphone Type 4953

    TYPE 4953

    ½-inch Pressure-field Microphone, Prepolarized, 3 Hz – 10 kHz

    Pressure-field microphone designed for coupler measurements and in-cabin measurements (complying to ANSI standards) over a frequency range of 3 Hz to 10 kHz.
    • Dyn. range : 16 – 146 dB
    • Freq. range : 3 – 10000 Hz
    • Polarization : Prepolarized
    • Sensitivity : 50 mV/Pa
    • Standards :
  • ¼-inch free-field microphone Type 4954

    TYPE 4954

    1/4-inch Free-field Microphone, Prepolarized 

    Free-field microphone designed for high-level and high-frequency measurements over a frequency range of 4 Hz to 100 kHz.
    • Dyn. range : 35 – 165 dB
    • Freq. range : 4 – 100000 Hz
    • Polarization : Prepolarized
    • Sensitivity : 3.16 mV/Pa
    • Standards : IEC 61094-4 WS3F
  • Half inch infrasound microphone Type 4964

    TYPE 4964

    ½-inch Infrasound Microphone, Prepolarized

    Infrasound microphone specifically designed for high-precision, acoustic measurements with high sensitivity in the frequency range of 0.02 Hz to 20 kHz.
    • Dyn. range : 14.6 – 146 dB
    • Freq. range : .02 – 20000 Hz
    • Polarization : Prepolarized
    • Sensitivity : 50 mV/Pa
    • Standards : IEC 61094-4 WS2F
  • Prepolarized free-field microphone Type 4966

    TYPE 4966

    ½-inch 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.
    • Dyn. range : 14.6 – 144 dB
    • Freq. range : 5 – 20000 Hz
    • Polarization : Prepolarized
    • Sensitivity : 50 mV/Pa
    • Standards : IEC 61094-4 WS2F
  • Type 4971

    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.
    • Dyn. range : 19 – 162 dB
    • Freq. range : 5 – 20000 Hz
    • Polarization : Prepolarized
    • Sensitivity : 12.5 mV/Pa
    • Standards : IEC 61094-4 WS2P

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