Bruel & Kjaer

Bruel & Kjaer

Brüel & Kjær (B&K), now part of HBK – Hottinger Brüel & Kjær, is a Danish manufacturer with over 75 years of expertise in sound and vibration measurement. The company produces a comprehensive range of instruments including sound level meters, microphones, accelerometers, vibration analyzers, octave filter sets, and signal conditioning equipment used by engineers and researchers worldwide.

B&K instrumentation is widely recognized as a reference standard in acoustic and vibration measurement. Their product portfolio spans basic sound level measurement to complex multi-channel data acquisition and modal analysis, covering noise and vibration testing throughout the product development lifecycle, environmental noise assessment, and structural health monitoring.

Key Product Lines

• Sound Level Meters & Calibrators — precision acoustic measurement instruments including audiometer calibrators and reference sound sources
• Octave & Band-Pass Filters — analog and digital filter sets including octave, 1/3-octave, and tunable band-pass configurations for frequency-selective analysis
• Vibration Analyzers & Accelerometers — sensors and instruments for machinery vibration, structural dynamics, and NVH testing
• Data Acquisition Systems — multi-channel systems for simultaneous noise, vibration, and harshness measurement
• Signal Conditioning & Amplifiers — preamplifiers and conditioning modules for microphone and transducer signal processing

Industries Served

Brüel & Kjær equipment is used across automotive NVH testing, aerospace & defense, consumer electronics development, building acoustics, environmental noise monitoring, industrial machinery diagnostics, power generation, telecommunications, and research institutions conducting acoustic and structural dynamics studies.