Sound Transmission in a Duct with Sudden Area Expansion, Extended Inlet, and Lined Walls in Overlapping Region

The transmission of sound in a duct with sudden area expansion and extended inlet is investigated in the case where the walls of the duct lie in the finite overlapping region lined with acoustically absorbent materials. By using the series expansion in the overlap region and using the Fourier transf...

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Bibliographic Details
Published in:Advances in Acoustics and Vibration 2016-01, Vol.2016, p.216-223
Main Author: Demir, Ahmet
Format: Article
Language:English
Subjects:
Acoustics
Boundary value problems
Expansion
Fourier transforms
Helmholtz equations
Investigations
Methods
Noise
Sound
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Summary:The transmission of sound in a duct with sudden area expansion and extended inlet is investigated in the case where the walls of the duct lie in the finite overlapping region lined with acoustically absorbent materials. By using the series expansion in the overlap region and using the Fourier transform technique elsewhere we obtain a Wiener-Hopf equation whose solution involves a set of infinitely many unknown expansion coefficients satisfying a system of linear algebraic equations. Numerical solution of this system is obtained for various values of the problem parameters, whereby the effects of these parameters on the sound transmission are studied.
ISSN:1687-6261
1687-627X
1687-6261
DOI:10.1155/2016/9485163