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RESEARCH PAPERS: Noise Control and Acoustics

A Multiple Degree of Freedom Cavity Element for Acoustic Transmission Lines

[+] Author and Article Information
W. Eversman

University of Missouri-Rolla, Rolla, MO 65401

G. Ricci

AC Spark Plug Division, General Motors Corporation, Flint, MI 48556

J. Vib., Acoust., Stress, and Reliab 110(1), 76-83 (Jan 01, 1988) (8 pages) doi:10.1115/1.3269484 History: Received September 18, 1987; Online November 23, 2009

Abstract

Mathematical modelling of acoustic transmission lines containing elements which can be represented by their acoustic modes is considered. Of particular interest are tapered elements and acoustic cavities which operate at frequencies above which a simple volume expansion representation or a plane wave representation is adequate. An element matrix formulation is given which is suitable for inclusion in the Acoustic Wave Finite Element assembly procedure, or with suitable modifications, to the more traditional transfer matrix approach. Numerical examples are provided demonstrating the accuracy of the procedure.

Copyright © 1988 by ASME
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