It is useful for optimizing the radiated sound of a wide range of products, from automobiles, home appliances, power tools, and large machinery to components such as exhaust systems!
Noise Source Identification (NSI) is useful for optimizing the radiated sound of a wide range of products, from automobiles, home appliances, and power tools to components such as engines, tires, gearboxes, and exhaust systems. The goal of NSI is to identify the location, frequency components, and acoustic power of the sound source that contributes the most to the object in question. By ranking the contributions of each sound source, it is possible to determine where design changes would most effectively improve the overall radiated sound. Using methods based on microphone arrays allows for high-quality results to be obtained with short measurement times. Additionally, by combining acoustic holography and beamforming techniques, accurate and high-resolution mapping across the entire audible frequency range is achievable. Time-domain methods can be applied to gain detailed insights into transient phenomena such as impacts and rotational rises, or steady sound sources (for example, radiated sound at different crank angles of an engine). For large steady sound sources, automatic measurements can be conducted using a microphone positioning system (robot). For more details, please contact us or download the catalog.
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basic information
• Model 8606 Spherical Beamforming: Capable of creating a 360° map around the array without introducing assumptions about the sound field, regardless of the sound environment. • Model 8607 Acoustic Holography: A method for mathematically representing the sound field based on measurements taken at multiple locations. • Model 8608 Beamforming: A method for identifying sound levels based on the direction from which sound arrives and mapping sound sources. • Post-processing of data is possible for all applications. • The following options are available for all applications: conformal mapping, transient (non-stationary) analysis, quasi-stationary analysis, and sound quality metrics calculation. • Refined beamforming options to improve spatial resolution (for beamforming). • Moving source options for automobiles and trains (for beamforming). • Panel contribution, intensity component analysis, and in-situ sound absorption measurement options (for acoustic holography). ◎ For more details, please contact us or download the catalog.
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Company information
Bruel & Kjaer (Spectris Corporation, HBK Division) will reflect the diligence of Denmark and the innovation of Japan in our products. We aim to bring the experience and wisdom of our Danish headquarters, which has been dedicated to "acoustics and vibration for 75 years," to Japan through Bruel & Kjaer Japan. Additionally, we want to showcase Japan's delicate and advanced technology, which is at a world-class level, to the world through the Bruel & Kjaer Group's network.