Brüel & Kjær Sound & Vibration Measurement A/S

Measurements on the Move

Brüel & Kjær adds ‘moving source’ software option to data analyser system

March 2011 -- Performing noise source identification on moving vehicles is now an easier process with Brüel & Kjær’s Moving Source Option.

Unlike traditional Beamforming kits, the Moving Source software follows a mobile target, instead of focusing on a single point. It tracks linear movement parallel to a planar microphone array and enables speed-position calculation from a radar signal, GPS or photocells.

Beamforming is a method of mapping noise sources using an acoustical array. It discerns the direction from which a sound originates, by means of the time delays that occur as the sound passes over an array of microphones.

This method is very quick, allowing a full map to be calculated from a single-shot measurement, making it ideal for noise source location of sound radiated from moving vehicles such as cars, Lorries and trains. Moving Source Beamforming can also be used as a troubleshooting contribution during pass-by measurements and mapping planes from the side of a vehicle.

Brüel & Kjær’s PULSE hardware provides a stable and continually evolving data analysis system, which allows users to add upgrades, rather than switching to an entirely new system, as software is developed.

On a global scale there are currently more than 9,500 PULSE systems being used - within automotive, aerospace, education and telecommunication industries - for research development and production test purposes. An overview of the complete range of measurement solutions encompassed by the PULSE system platform is given in the latest PULSE Analyser & Solutions catalogue.

For more information, please contact: 01763 255 780 or


About Brüel & Kjær
Brüel & Kjær is a world-leading manufacturer and supplier of sound and vibration solutions for use in a wide range of applications including: environmental noise measurements, building acoustics, vibration measurements and quality control for use in the automotive, aerospace and consumer industries, as well as by local authorities.

We design and manufacturer sound level meters, microphones and accelerometers, conditioning amplifiers, calibrators, noise and vibration analysers and software. To see our full range and for more information, please visit or contact our sales team: telephone +44 (0) 1763 255 780 or email:

Brüel & Kjær also runs a variety of training courses throughout the year, from basic introductions on noise and it’s effects to more specialised classes teaching customers how to get the most out of their equipment. To see our full training course calendar, visit:

Free, online training courses - conducted by our expert engineers - run throughout the year too. For registration details and the latest planned web training sessions, visit:

Brüel & Kjær has two laboratories in the Royston Facility which are UKAS accredited to the international standard ISO/IEC 17025. Brüel & Kjær can provide traceable or accredited calibration for sound level meters, microphones, calibrators, artificial ears, conditioning amplifiers and accelerometers.
Brüel & Kjær has 1150 employees, with sales offices in 55 countries. Brüel & Kjær is a subsidiary of UK-based Spectris plc ( which has annual sales of £787m and employs around 6,000 people worldwide in its 13 business units.
For additional information please contact:
Heather Wilkins
Marketing Coordinator
Bruel & Kjaer UK Ltd
Telephone: 01763 255 780

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