Change search
ReferencesLink to record
Permanent link

Direct link
A New Type of Muffler Based on Microperforated Tubes
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, MWL Flow acoustics.ORCID iD: 0000-0001-7898-8643
2011 (English)In: Journal of Vibration and Acoustics-Transactions of the ASME, ISSN 1048-9002, Vol. 133, no 3, 031005- p.Article in journal (Refereed) Published
Abstract [en]

Microperforated plate (MPP) absorbers are perforated plates with holes typically in the submillimeter range and perforation ratios around 1%. The values are typical for applications in air at standard temperature and pressure (STP). The underlying acoustic principle is simple: It is to create a surface with a built in damping, which effectively absorbs sound waves. To achieve this, the specific acoustic impedance of a MPP absorber is normally tuned to be of the order of the characteristic wave impedance in the medium (similar to 400 Pa s/m in air at STP). The traditional application for MPP absorbers has been building acoustics often combined with a so called panel absorber to create an absorption peak at a selected frequency. However, MPP absorbers made of metal could also be used for noise control close to or at the source for noise control in ducts. In this paper, the possibility to build dissipative silencers, e. g., for use in automotive exhaust or ventilation systems, is investigated.

Place, publisher, year, edition, pages
2011. Vol. 133, no 3, 031005- p.
National Category
Fluid Mechanics and Acoustics
URN: urn:nbn:se:kth:diva-32613DOI: 10.1115/1.4002956ISI: 000289119000005OAI: diva2:411730
TrenOp, Transport Research Environment with Novel Perspectives
QC 20110419Available from: 2011-04-19 Created: 2011-04-18 Last updated: 2012-06-12Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full text

Search in DiVA

By author/editor
Allam, SabryÅbom, Mats
By organisation
MWL Flow acoustics
In the same journal
Journal of Vibration and Acoustics-Transactions of the ASME
Fluid Mechanics and Acoustics

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 206 hits
ReferencesLink to record
Permanent link

Direct link