Boundary Element Prediction of Sound Propagation in Ducts Containing Bulk Absorbing Materials

[+] Author and Article Information
A. F. Seybert

Department of Mechanical Engineering, 521 CRMS Building, University of Kentucky, Lexington, KY 40506-0108

R. A. Seman, M. D. Lattuca

Lexmark International, Inc., Lexington, KY 40511

J. Vib. Acoust 120(4), 976-981 (Oct 01, 1998) (6 pages) doi:10.1115/1.2893929 History: Received June 01, 1997; Online February 26, 2008


In this paper the sound propagation in a rectangular duct containing a bulk absorbing foam liner is investigated. The foam is characterized by the complex characteristic impedance and propagation constant which are measured using an improved two-cavity method. These quantities are used to predict the normal incidence impedance and absorption coefficient of the foam which is compared to measured data obtained using the ASTM E-1050 test method. The complex characteristic impedance and propagation constant are also used to predict the attenuation through a layer of foam in a plane-wave tube for which measured results are also available. Finally, the boundary element method is used to predict the attenuation of sound in a rectangular duct where one surface is replaced by a foam-filled cavity. Comparison with experiment is shown for several frequencies.

Copyright © 1998 by The American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.





Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In