On the completeness and orthogonality of the acoustic modes of an open cavity

James Leader, Jie Pan

Research output: Chapter in Book/Conference paperConference paper

1 Citation (Scopus)

Abstract

The modal representation of closed acoustical systems such as rooms and enclosures is well known and is commonly used to find the forced response at a given frequency as the superposition of the modes. In open systems such as parallel noise barriers, open enclosures or reactive type duct mufflers, the modal representation may be incomplete due to radiation losses encompassed by the imaginary part of the eigensolution. This has been declared as an open problem in the literature, with sound field predictions being found accurate only at the resonant frequencies. In the present study, the completeness and orthogonality of the quasinormal modes is investigated using the example of a two-dimensional open cavity system.
Original languageEnglish
Title of host publicationProceedings of Acoustics 2015 Hunter Valley
Place of PublicationAustralia
PublisherAustralian Acoustical Society
Pages71-81
Volume1
Publication statusPublished - 2015
EventOn the Completeness and Orthogonality of the Acoustic Modes of an Open Cavity - Hunter Valley, NSW
Duration: 1 Jan 2015 → …

Conference

ConferenceOn the Completeness and Orthogonality of the Acoustic Modes of an Open Cavity
Period1/01/15 → …

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