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.

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 :
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 :
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 :
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
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 :
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
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 :
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
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
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
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
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 :
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
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
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
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 :
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 :
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 :
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 :
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
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 :
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 :
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 :
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
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
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

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

Microphone Cartridges

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