Change search
ReferencesLink to record
Permanent link

Direct link
Modified impedance tube measurements and energy dissipation inside absorptive materials
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, Marcus Wallenberg Laboratory MWL.ORCID iD: 0000-0002-9632-8398
2013 (English)In: Applied Acoustics, ISSN 0003-682X, Vol. 71, no 12, 1480-1485 p.Article in journal (Refereed) Published
Abstract [en]

Impedance tube is an important tool to measure acoustic properties of a material, for which two methods have been standardized. The methods for a "modified" impedance tube have been developed recently to measure material properties in the condition of an anechoic termination. Instead of commonly used two-load or two-source methods, a method with direct and inverted configuration in cooperation with the single-microphone method is suggested in this paper. With the help of transfer matrix method, combined effect of several materials placed in series can be predicted from individual properties. A simple recurrence formula is obtained to relate the acoustic properties of a multilayer structure with the reflection and transmission coefficients of each layer. Very good agreements are obtained between the prediction and the direct measurements. Energy dissipations inside porous materials for different situations are studied and compared.

Place, publisher, year, edition, pages
2013. Vol. 71, no 12, 1480-1485 p.
Keyword [en]
Sound absorption, Impedance tube, Scattering matrix, Transfer matrix method, Direct and inverted configurations
National Category
Engineering and Technology
URN: urn:nbn:se:kth:diva-131223DOI: 10.1016/j.apacoust.2013.06.013ISI: 000324227100021ScopusID: 2-s2.0-84880351638OAI: diva2:655343

QC 20131011

Available from: 2013-10-11 Created: 2013-10-10 Last updated: 2013-10-11Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full textScopus

Search in DiVA

By author/editor
Feng, Leping
By organisation
Marcus Wallenberg Laboratory MWL
In the same journal
Applied Acoustics
Engineering and Technology

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: 40 hits
ReferencesLink to record
Permanent link

Direct link