Brüel & Kjær Sound & Vibration Measurement A/S - Noise and Vibration Testing, Underwater Acoustics, Structural Analysis, Acoustic Fatigue & Shock Testing, HUMS Transducers and Test Cell Systems.

Noise and vibration test and measurement solutions

Brüel & Kjær is a world leading provider of noise and vibration test and measurement solutions, boasting over 65 years in the sound and vibration business. Solutions cover acoustic, rotating, structural and environmental testing for the civil, military and space industries.

A world-leading provider of advanced noise and vibration testing and measurement solutions for R&D, production and operational applications.

Brüel & Kjær specialises in systems that ensure structural reliability, performance and optimal design, and manage the acoustics of military equipment and vehicles for air, space, ground and underwater use.

Complete systems from one partner

Covering the entire measurement chain for comprehensive noise and vibration testing, Brüel & Kjær offers complete systems from one partner.

• Transducers
• Acquisition hardware
• Vibration shaker systems
• Analysis software
• Final documentation and reporting

Acoustic stealth detection - Less detectable noise footprints

Acoustic stealth and acoustic discretion play a vital role in submarine operations. Brüel & Kjær supply systems for acoustic ranging of submarines and surface ships; for noise source investigation during design and build; and for self-monitoring during operations.

Above the water and up in the skies UAVs are playing an increasing important defensive role, and have needs - just as with submarines - to be less detectable. Noise footprint and noise characterisation are important. Brüel & Kjær designs and builds arrays for noise source identification.

• Noise source investigation during design and build
• Self-monitoring during operation
• Noise footprint analysis
• Noise source identification
• 3D noise mapping
• Underwater acoustic ranging

Durability testing systems

For any aircraft, helicopter, space vehicle or ballistic device, reliability is the number one priority.

Brüel & Kjær's noise and vibration detection and shock testing systems, transducers and high-speed data acquisition systems prove the reliability and integrity of machinery, vehicles, ballistic devices and more.

• Accelerated lifetime vibration testing
• Fatigue testing
• Climatic simulation
• Package testing

Engine and gearbox monitoring

Stringent engine and gearbox monitoring is important for any vehicle, as vibration analysis of rotating machinery provides valuable information on engine health, reliability and performance.

Brüel & Kjær HUMS (Health Usage Monitoring Systems) transducers are permanently mounted on the gearboxes of civil and military helicopters. Our vibration measurement and analysis solutions are found in test-cell applications and on-ground maintenance systems.

• Test-cell applications and on-ground checks
• Balancing
• Vibration diagnostics using real-time analysis
• HUMS transducers

Structural Dynamics - analysing structures

Structural dynamics and the testing of structures is essential to understand and optimise the inherent dynamic properties of structures in order to ensure reliable and safe operation.

Our Structural Test Suite offers complete solutions for controlled excitation testing, real-life operational testing and test-FEA integration - from the smallest components to the largest assembled structures.

• Controlled excitation testing
• Classical and Operational Modal Analysis
• Operational monitoring, testing and troubleshooting
• Virtual model validation
• Operational Deflection Shapes

Environmental noise impact testing and monitoring

With increased focus on environmental noise impact by testing and monitoring of noise levels, responsible organisations are looking for ways of reducing their environmental noise impact on armed forces personnel and local communities.




Brüel & Kjær supplies systems for occupational health, helmet/cabin/cockpit noise assessment, acoustic and human vibration monitoring, urban noise monitoring and noise-mapping of vehicles.



• Occupational health
• Helmet/cabin/cockpit noise assessment
• Human acoustic and vibration monitoring
• Urban, airport, industrial and construction noise monitoring
• Vehicle noise mapping

Brüel & Kjær has over six decades' experience of providing innovative solutions for noise and vibration testing.

• More than 90 sales offices in 55 countries
• 12 accredited calibration centres
• R&D engineers in Denmark, UK, USA and India

Brüel & Kjær has the largest global service organisation within sound and vibration.