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Exhaust and Intake Noise and Acoustical Design of Mufflers
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, Marcus Wallenberg Laboratory MWL.ORCID iD: 0000-0002-3826-3055
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, MWL Flow acoustics.ORCID iD: 0000-0002-8474-8563
2008 (English)In: Handbook of Noise and Vibration Control / [ed] Malcolm J. Crocker, John Wiley & Sons, 2008, 1034-1053 p.Chapter in book (Refereed)
Abstract [en]

A muffler or silencer is a device used in a flow duct to prevent sound from reaching the openings of the duct and radiating as far-field sound. Reactive silencers do this by reflecting sound back towards the source while absorptive silencers attenuate sound using absorbing material. They are necessary components in the design of any exhaust or intake system for internal combustion (IC) engines. No car or truck can pass the standard noise tests required by legislation or compete on the market without them. There are three basic requirements for a modern exhaust systems; compact outer geometry, sufficient attenuation and low pressure drop.


The aim of this chapter is to discuss acoustical design and analysis of IC-engine exhaust and intake systems. The specific problems of modern intake systems made from plastic material with non-rigid walls are not discussed because not much has been published on this subject. The theory and techniques presented can be used also for other applications such as compressors and pumps and to some extent also for air-conditioning and ventilation systems.

Place, publisher, year, edition, pages
John Wiley & Sons, 2008. 1034-1053 p.
Keyword [en]
IC-engine noise, mufflers, exhaust system, intake system, aftertreatment, source characterisation
National Category
Engineering and Technology
URN: urn:nbn:se:kth:diva-62402DOI: 10.1002/9780470209707.ch85ScopusID: 2-s2.0-84891307466ISBN: 978-0-471-39599-7OAI: diva2:480262

QC 20120306. QC 20160129

Available from: 2012-01-19 Created: 2012-01-19 Last updated: 2016-01-29Bibliographically approved

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Glav, RagnarBodén, Hans
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