Brüel & Kjær
| Brüel & Kjær Sound & Vibration Measurement A / S
|
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|---|---|
 |
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| legal form | Aktieselskab |
| founding | 1942 |
| Seat |
Naerum , Denmark
|
| Branch | Vibration damper |
| Website | www.bksv.com |
Brüel & Kjær (Sound and Vibration Measurement A / S) is a manufacturer of high-precision sound and vibration measurement devices.
The company's headquarters are in Nærum near Copenhagen . Brüel & Kjær has sales offices in 55 countries and more than 1,150 sales and customer service employees worldwide.
founder
Brüel & Kjær was founded on November 28, 1942 by Per Vilhelm Brüel (* March 6, 1915 - April 2, 2015) and Viggo Kjær (* June 5, 1914 - July 25, 2013). The two founders met as students at the Polytechnic School in Copenhagen . After finishing their studies in 1939, they decided to develop acoustic measuring devices . Holger Nielsen joined as a third partner in 1945 and stayed with the company until his death in 1978.
Development of the product lines
- 1940s - Precision measuring devices, including RF spectrum analyzers and Geiger counters . The first measuring device that Brüel & Kjær built was the type 2401 tube voltmeter . Success began with the type 2301, which was built in 1949. The device has been revised several times since then. The latest version, Type 2307, was introduced in 1972. In 1943, Brüel & Kjær launched the 4301, the world's first acceleration sensor of the charge type, and thus entered the field of vibration measurement technology .
- 1950s - sound and vibration measurement, u. a. Development of logarithmic level recorders , signal generators and frequency analyzers.
- 1960s - measuring microphones, preamplifiers and calibrators, as well as sound level measuring devices according to the IEC standard.
- 1970s - Parallel analyzers, including the world's first analyzer with digital filters.
- 1980s - The first commercially available instrument for measuring sound intensities . Extension of the measuring range of the devices. A two-channel FFT analyzer.
- 1990s - multi-channel systems, including devices for acoustic holography .
- 2000s - surface microphones and new technologies such as TEDS, Dyn-X, REq-X, LAN-XI.
Organizational development
In 1992, Brüel & Kjær was sold to the German holding company AGV and split into a number of individual companies:
- Brüel & Kjær Sound and Vibration Measurement A / S (The core business with sound and vibration measurement technology)
- Brüel & Kjær Vibro (condition monitoring of machines)
- BK Medical (Medical Ultrasound Diagnostic Equipment)
- Innova Air Tech Instruments A / S (gas analysis instruments)
- Danish Pro Audio (studio microphones)
After the company split, some of the former employees founded GRAS Sound and Vibration. AGIV built up the Spectris department, which includes Brüel & Kjær, Hottinger Baldwin Messtechnik GmbH (HBM), and BTG Instruments GmbH. In July 2000 the Spectris division was transferred to the British Fairey Group Ltd. sold. In May 2001, the Fairey Group changed its name to Spectris Plc.
In early 2009, Brüel & Kjær acquired LDS Test & Measurement and the Australian Lochard Ltd.
On January 1, 2019, Brüel & Kjaer merged with the German sister company Hottinger Baldwin Messtechnik to "HBK" ( Hottinger, Brüel & Kjær ).
Web links
Individual evidence
- ^ Svend Gade: A Brüel & Kjær History Lesson - Short Version . In Sound and Vibration , issue 8/2008. ( Digitized version )
- ↑ Brüel & Kjær takes over LDS Test and Measurement
- ↑ HBM and BKSV merge to become HBK. Retrieved July 4, 2018 .