Special Microphones
Special microphones designed for specific measurement applications. Brüel & Kjær provide four special microphone types ranging from outdoor microphones, surface microphones, array microphones, and probe microphones. Each microphone provided with ranging adaptability for specific environments and measurement conditions.
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TYPE 4989-A
1/4" Production line test microphone
Pressure-field production line test microphone for cost effective and precise measurements close to sound ports in production testing.
- Dyn. range : 30 – 140 dB
- Freq. range : 5 – 20 kHz
- Polarization voltages :
- Sensitivity : 9 mV/Pa
- Temperature range : -20 – 60 ℃
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TYPE 4178
1/4" Sound Intensity Microphone Pair, Ext. Polarized
Sound Intensity Microphones specially designed for high level and high frequency measurements over a frequency range of 4 Hz to 100 kHz, with broadband matching of phase responses.
- Dyn. range : 28 – 164 dB
- Freq. range : 2.6 – 180000 Hz
- Polarization voltages : 200 V
- Sensitivity : 4 mV/Pa
- Temperature range : -40 – 150 ℃
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TYPE 4197
½-inch Microphone pair for Sound Intensity
Phase-matched pair of ½-inch microphones, designed for being used with Brüel & Kjær’s range of sound intensity analyzers.
- Dyn. range : 20 – 162 dB
- Freq. range : 0.3 – 20000 Hz
- Polarization voltages : 200 V
- Sensitivity : 11.2 mV/Pa
- Temperature range : -10 – 50 ℃
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TYPE 4948
Surface Microphone Type 4948 is designed to be used in aerospace. For example, on airplane surfaces during in-flight testing and is also well suited to wind-tunnel testing, limited spaces, or near to hard reflective surfaces.
- Dyn. range : 55 – 160 dB
- Freq. range : 5 – 20000 Hz
- Polarization voltages : V
- Sensitivity : 1.4 mV/Pa
- Temperature range : -55 – 100 ℃
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TYPE 4948-B
Surface Microphone Type 4948-B is designed for measuring airplane surfaces during in-flight testing. The microphone also well suited to wind-tunnel testing, limited spaces, or near to hard reflective surfaces, and is supplied with two coaxial cables and CIC.
- Dyn. range : 55 – 160 dB
- Freq. range : 5 – 20000 Hz
- Polarization voltages : V
- Sensitivity : 1.4 mV/Pa
- Temperature range : -55 – 100 ℃
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TYPE 4949
Surface Microphone For Automotive Applications
Automotive surface microphone designed for measurement of the true surface pressure. Ideal for mounting directly on the car surface during wind-tunnel tests and for measuring in confined spaces.
- Dyn. range : 30 – 140 dB
- Freq. range : 5 – 20000 Hz
- Polarization voltages : V
- Sensitivity : 11.2 mV/Pa
- Temperature range : -30 – 100 ℃
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TYPE 4949-B
Automotive Surface Microphone with two coaxial cables and CIC, designed for measurement of the true surface pressure, especially in automotive applications. It is well-suited for mounting directly on the car surface during wind-tunnel tests or for easy measurement in confined spaces.
- Dyn. range : – dB
- Freq. range : – Hz
- Polarization voltages : V
- Sensitivity : mV/Pa
- Temperature range : – ℃
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TYPE 4957
Prepolarized Array Microphone for use in systems requiring a large number of microphones, for example, beamforming arrays, STSF measurements, and non-stationary STSF measurements.
- Dyn. range : 32 – 134 dB
- Freq. range : 50 – 10000 Hz
- Polarization voltages : 0 V
- Sensitivity : 11.2 mV/Pa
- Temperature range : -10 – 55 ℃
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TYPE 4958
Prepolarized 20 kHz Array Microphone for STSF measurements, non-stationary STSF measurements and beamforming arrays, delivering excellent amplitude and phase matching .
- Dyn. range : 28 – 140 dB
- Freq. range : 10 – 20000 Hz
- Polarization voltages : 0 V
- Sensitivity : 11.2 mV/Pa
- Temperature range : -10 – 55 ℃
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TYPE 4959
Short Array Microphone for 20 kHz, Prepolarized
Short array microphone designed for use in our hand-held and foldable microphone array systems.
- Dyn. range : 32 – 134 dB
- Freq. range : 50 – 20000 Hz
- Polarization voltages : V
- Sensitivity : 11.2 mV/Pa
- Temperature range : -10 – 55 ℃
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TYPE 4182
Probe Microphone Type 4182 is optimized for near-field sound pressure measurements in places with limited space, or in harsh environments where a conventional microphone would be unsuitable.
- Dyn. range : 42 – 164 dB
- Freq. range : 1 – 20000 Hz
- Polarization voltages : 200 V
- Sensitivity : 3.16 mV/Pa
- Temperature range : -10 – 700 ℃
