Per Vilhelm Brüel, often referred to simply as Brüel, was a Danish engineer and entrepreneur known for his contributions to the field of acoustic measurement and instrumentation. He co-founded Brüel & Kjær, a company established in 1942 that became a prominent manufacturer of measurement and testing equipment for sound and vibration. The company is well-known for its innovations in acoustic technology, including sound level meters, vibration analyzers, and other related instruments.
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