For over 75 years, Brüel & Kjær has played a leading role in the world of sound and vibration. From the world's first charge accelerometer in 1943 to innovative solutions and advanced analyzer systems for 21st-century satellite systems - Brüel & Kjær has led this industry from the very beginning.
A humble start
Long before the legendary “garage nerds” of Silicon Valley, Denmark had its own technological visionaries – Per V. Brüel and Viggo Kjær. Brüel was the salesman and Kjær was the scientist. In many ways, they were a perfect match – both were firmly dedicated to placing the common goals of technological progress, science, and solutions above financial prosperity. Both knew if their technology was superior, the financial rewards would soon come.
In 1942, during one of the darkest times in Danish history, they founded a company based strictly on sound and vibration measurement. They were told by friends and mentors, “A company like that will never be able to support both of you.” Yet today, Brüel & Kjær has over 1000 employees globally.
Green paint – from surplus to symbol
Starting as they did during WWII, the pair of entrepreneurs needed to scrounge for every part and scrap of wire and to paint the instrument cases, they found some surplus army-green paint. Seven decades later, Brüel & Kjær instruments can still be recognized thanks to their distinctive green colour.
The following list highlights some of the ‘green’ milestones along the way.
Brüel & Kjær through the years
The company moves to the site of its current headquarters in Nærum, Denmark
The company starts its global expansion, establishing a sales office in the USA, soon followed by offices throughout Europe, the Middle East, Asia, and Africa over the next few decades
Per V. Brüel, an accomplished pilot, founded Brüel & Kjær Airways. A small fleet of company-owned and operated planes were used to deliver goods and to visit customers throughout the world, and to distant destinations such as Thailand, USA and Egypt. Per Brüel was often the pilot on these flights
Brüel & Kjær becomes the first western electronics firm to set up a service center in the People’s Republic of China.
The company celebrates the production of its 1,000,000th instrument
Introduction of the world’s first commercial acoustical holography system (Spatial Transformation of Sound Fields, STSF) to enable a complete model of the sound field to be made
Brüel & Kjær introduces what has become the backbone of our analyzer solutions: the Windows®-based PULSETM system. It included the groundbreaking concept of multi-analysis so that engineers could perform all their analyses simultaneously while monitoring the results live on-screen. The PULSE platform has evolved ever since and is now a comprehensive, flexible suite of software and hardware (including LAN-XI modular data acquisition (2008) and BK Connect sound and vibration analysis software (2018))
The world’s first flat surface microphone is developed with Airbus to measure sound pressure (noise) in limited spaces and where flush mounting of conventional microphone/preamplifier combinations would be impossible or cause undesired side effects
Introduction of the world’s first wideband holography: where one measurement and one calculation covers the full frequency range
Brüel & Kjær and HBM announce their plans to become HBK and integrate their expertise to provide an expanded measurement and testing portfolio that will offer more comprehensive solutions and cover a wider range of testing needs