Impacts of structural-acoustic coupling on the performance of energy density-based active sound transmission control

S. K. Lau, Shiu Keung Tang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

12 Citations (Scopus)


This paper investigates numerically the performance of the active sound transmission control into a rectangular cavity through a flexible panel under the energy density-based error-sensing algorithm. Full coupling between the sound transmitting panel and the enclosed space is considered. A pure vibration actuator, a pure acoustic source and a combined control source system are used as the secondary control source in the active control and their performances are studied. Formulae for the coupled eigenfrequencies of the cavity and the flexible panel are also derived. The strength of the structural-acoustic coupling, the ratio between the first eigenfrequencies of the cavity and the panel and the difference between the excitation frequency and the coupled eigenfrequencies, especially the latter, are found to have crucial impacts on the performance of the active control regardless the type of control source used.
Original languageEnglish
Pages (from-to)147-170
Number of pages24
JournalJournal of Sound and Vibration
Issue number1
Publication statusPublished - 4 Sep 2003

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Acoustics and Ultrasonics
  • Mechanics of Materials
  • Mechanical Engineering

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