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On sound power measurement of the engine in anechoic room with imperfections
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, MWL Structural and vibroacoustics.ORCID iD: 0000-0002-9632-8398
2013 (English)In: 42nd International Congress and Exposition on Noise Control Engineering 2013, INTER-NOISE 2013: Noise Control for Quality of Life, OAL-Osterreichischer Arbeitsring fur Larmbekampfung , 2013, 4358-4364 p.Conference paper (Refereed)
Abstract [en]

Engine noise is one of the most critical noises in urban noises. NVH improvements are essential in order to fulfill various noise emission regulations such as ISO 362. Reducing engine noise has become a necessity for engine developers. Measurement plays an important role beside the simulations to improve the NVH behavior, because the engine is a rather complicated mechanical system with many components. ISO 3745 is an ideal method for sound power measurement for internal combustion engines since it provides a fast measurement through many different engine speeds. However room as well as the measurement method, should comply with this standard. Because of the size and installation situation for a running engine there is limited space for measurement; and it is difficult to reach standards requirements especially for such a directive sound source. The difficulty to meet these requirements also applies to Scania's anechoic room. Here engine noise characteristics and the uncertainties in sound power measurement have been discussed based on both measurement and simulation. Recommendation has been made to decrease the uncertainty of sound power measurement.

Place, publisher, year, edition, pages
OAL-Osterreichischer Arbeitsring fur Larmbekampfung , 2013. 4358-4364 p.
Keyword [en]
Sound power measurement, IC Engine, Anechoic room
National Category
Other Mechanical Engineering
URN: urn:nbn:se:kth:diva-136779ScopusID: 2-s2.0-84904489131ISBN: 978-163266267-5OAI: diva2:677153
42nd International Congress and Exposition on Noise Control Engineering 2013: Noise Control for Quality of Life, INTER-NOISE 2013; Innsbruck; Austria; 15 September 2013 through 18 September 2013

QC 20131219

Available from: 2013-12-09 Created: 2013-12-09 Last updated: 2014-09-15Bibliographically approved

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