Isuzu improve Diesel Engine Sound Quality

In recent years, environmental issues have placed a big emphasis on vehicle emission and vehicle noise - including improved engine noise performance
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Bruel Kjaer
Noise Measure


Royston - Hertfordshire - England

Sept. 2, 2011 - PRLog -- It is becoming increasingly important not just to reduce the radiated sound pressure, but also to improve the sound quality of vehicles for the comfort of both passengers and local residents.

In order to improve the perceived sound quality of diesel engines, Isuzu worked with sound and vibration expert, Brüel & Kjær to develop mapping of Sound Quality metrics, where noise sources can be identified based on their sound character using perception-based metrics such as loudness, sharpness and roughness.

Together, the companies also developed a new impulsiveness algorithm to clearly identify the source of impulsive noise in diesel engines. The result of the collaborative project is now the world’s first commercially available sound quality metrics mapping software for beamforming and Statistically Optimal Near-field Acoustic Holography (SONAH) systems.

Isuzu’s relationship with Brüel & Kjær goes back more than 30 years, with much of Isuzu’s equipment - such as microphones, Data Acquisition systems and wheel arrays - supplied by Bruel & Kjaer.

Read the full Isuzu case study on


About Brüel & Kjær
Brüel & Kjær is a world-leading manufacturer and supplier of sound and vibration measurement systems. Brüel & Kjær helps its customers measure and manage the quality of sound and vibration in their products and in the environment. Focus areas are aerospace, space, defence, automotive, ground transportation, airport environment, urban environment, telecom, and audio.

Brüel & Kjær has an unparalleled portfolio of sound and vibration equipment, and is a renowned deliverer of innovative instrumentation, including sound level meters, microphones, accelerometers, conditioning amplifiers, calibrators, noise and vibration analysers and software. To see the full range of products and systems, please visit

Brüel & Kjær also runs a variety of training courses, from basic introductions to noise and it’s effects to more specialised classes teaching customers how to get the most out of their equipment. Free, online training courses - conducted by our expert engineers - run throughout the year too. For all course registration details visit

Brüel & Kjær is a subsidiary of UK-based Spectris plc ( which has annual sales of £902m and employs around 6,000 people worldwide across its four business segments. Brüel & Kjær has 1,050 employees worldwide, and is represented by sales offices in 55 countries.

For additional information please contact:
Heather Wilkins
Marketing Coordinator
Bruel & Kjaer
Telephone: 01763 255 780

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World-leading manufacturer and supplier: sound and vibration solutions for environmental noise measurements, building acoustics, vibration measurements and quality control for use in the automotive, aerospace, consumer industries, local authorities
Source:Bruel & Kjaer
Email:*** Email Verified
Phone:01763 255 789
Zip:SG8 5BQ
Tags:Bruel Kjaer, Sound, Vibration, Environment, Noise Measure, Building, Acoustic
Industry:Automotive, Environment
Location:Royston - Hertfordshire - England
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