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 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 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 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 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 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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