On the accuracy of modal analysis in reverberant acoustical systems with damping

TitleOn the accuracy of modal analysis in reverberant acoustical systems with damping
Publication TypeJournal Article
Year of Publication1995
AuthorsLP Franzoni, and EH Dowell
JournalThe Journal of the Acoustical Society of America
Volume97
Start Page687
Issue1
Pagination687 - 690
Date Published01/1995
Abstract

That the modal analysis method works well regardless of the amount of damping in the system, provided that modal coupling is included in the analysis, is shown. The soundfield produced by a vibrating piston in a tube with an absorptive end is calculated. An exact solution is compared to results computed by modal analysis with and without the inclusion of modal coupling. Recent published results, which did not include the effects of modal coupling, incorrectly concluded that discrepancies were due to limitations of modal analysis, rather than the uncoupling assumption. © 1995, Acoustical Society of America. All rights reserved.

DOI10.1121/1.412291
Short TitleThe Journal of the Acoustical Society of America