Microphones for Aerospace and Defence

A Heritage of State-of-the-Art Microphones

Brüel & Kjær has been producing microphones for almost six decades. In fact, company founder Per V. Brüel designed his first condenser microphone way back in 1945. Ever since then, Brüel & Kjær has pioneered innovative solutions for microphones and preamplifiers and rarely has a year gone by without the introduction of a new Brüel & Kjær product in this area.

Find dedicated microphones for:

• Surface Measurements
• Engine Noise
• Beamforming
• General Sound Pressure
• Exterior Noise
• Wind-tunnel
• In-cabin

Surface Measurements

4948/4948A/4948B – Pressure Measurement on the Skin of an Airplane/Turbulent Pressure Fluctuation measurement/Aeroacoustic Noise Measurement/Surface Measurements at Flyover Tests. Surface Microphone with built-in DeltaTron® preamplifier. Despite its small size, it is a rugged and stable measurement microphone. The microphone housing and the metallic parts of the diaphragm-backplate arrangement, including the diaphragm, are all titanium, ensuring uniquely high resistance to corrosion. > Product Data > Product Data Type 4948A > Surface Microphone product page > Interactive Tour

Rocket Engine Noise Measurements/Very High Sound Pressure Level Measurements/High-Frequency Measurements
	4941 – This High-level Pressure-field ¼-inch Microphone is specially designed for very high-level measurements in frequency range 4Hz to 20 kHz. The microphone can be exposed to maximum pressure of 201 dB peak. > Product Data
	4938/4938A-011 – Pressure-field ¼-inch Microphone is designed for high-level and high-frequency measurements. Using new materials and a new way of mounting the diaphragm, the microphone is geared to withstand rough handling and high temperatures of up to 300°C (572°F). Assembled in a clean room environment ensuring that it can be used in high-humidity environments and still produce reliable results. > Product Data

Beamforming Measurements
	4935 – This array microphone is a 7mm (~ 1/4inch) prepolarized microphone with built in DeltaTron® preamplifier and transducer identification. When used for simultaneous measurement of a large number of signals, the microphones can be clipped into a strong yet light grid network to form a complete array. > Product Data
	4951 – This 20kHz array microphone is a short, prepolarized microphone suited for use in systems requiring a large number of microphones, for example, beamforming arrays. > Product Data
	4944A – Prepolarized pressure-field ¼-inch Microphone laser welded to a ¼-inch DeltaTron® preamplifier. Supports TEDS. > Product Data
	8103 – Individually calibrated waterborne-sound transducer with a flat frequency response and is omnidirectional over a wide frequency range. Its construction is such that it is absolutely waterproof and has good corrosion resistance.

General Sound Pressure Level Measurements
	4189/4189A-031 – Prepolarized, free-field microphone for measurements in accordance with IEC 651 Type 1. Well suited to general sound measurements requiring frequency analysis. > Product Data

Exterior Noise Measurements
	4189 – Prepolarized, free-field microphone for measurements in accordance with IEC 651 Type 1. Well suited to general sound measurements requiring frequency analysis. > Product Data
	4190 – Falcon® Range ½-inch precision condenser microphones microphone. Covers requirements for free-, random and pressure-field measurements. Corrosion-resistant with a wide temperature range. Robust design ensuring greater reliability and accuracy. > Product Data

Pressurised Wind Tunnel Measurements on Scale Models (High Static Pressure)

4938W-001 – Pressure-field ¼-inch Microphone is designed for high-level and high-frequency measurements. Using new materials and a new way of mounting the diaphragm, the microphone is geared to withstand rough handling and high temperatures of up to 300°C (572°F). Assembled in a clean room environment ensuring that it can be used in high-humidity environments and still produce reliable results. > Product Data

In-cabin Noise Measurements
	4942/4943 – Prepolarized diffuse-field ½-inch Microphone optimised for general random-incidence measurements and for standardised noise measurements in accordance with ANSI standards. Suitable for indoor situations, where the sound is reflected by walls, ceilings, and objects in the room, or measurements inside the cabin of an aircraft. > Product Data 4942 > Product Data 4943

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