Modeling and analysis of secondary sources coupling for active sound field reduction in confined spaces

Montazeri, Allahyar and Taylor, C. James (2017) Modeling and analysis of secondary sources coupling for active sound field reduction in confined spaces. Mechanical Systems and Signal Processing, 95. pp. 286-309. ISSN 0888-3270

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Abstract

This article addresses the coupling of acoustic secondary sources in a confined space in a sound field reduction framework. By considering the coupling of sources in a rectangular enclosure, the set of coupled equations governing its acoustical behavior are solved. The model obtained in this way is used to analyze the behavior of multi-input multi-output (MIMO) active sound field control (ASC) systems, where the coupling of sources cannot be neglected. In particular, the article develops the analytical results to analyze the effect of coupling of an array of secondary sources on the sound pressure levels inside an enclosure, when an array of microphones is used to capture the acoustic characteristics of the enclosure. The results are supported by extensive numerical simulations showing how coupling of loudspeakers through acoustic modes of the enclosure will change the strength and hence the driving voltage signal applied to the secondary loudspeakers. The practical significance of this model is to provide a better insight on the performance of the sound reproduction/reduction systems in confined spaces when an array of loudspeakers and microphones are placed in a fraction of wavelength of the excitation signal to reduce/reproduce the sound field. This is of particular importance because the interaction of different sources affects their radiation impedance depending on the electromechanical properties of the loudspeakers.

Item Type:
Journal Article
Journal or Publication Title:
Mechanical Systems and Signal Processing
Additional Information:
This is the author’s version of a work that was accepted for publication in Mechanical Systems and Signal Processing. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Mechanical Systems and Signal Processing, 95, 2017 DOI: 10.1016/j.ymssp.2017.03.025
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/2200/2202
Subjects:
ID Code:
85650
Deposited By:
Deposited On:
22 Mar 2017 13:14
Refereed?:
Yes
Published?:
Published
Last Modified:
18 Sep 2020 01:37