Underwater sound radiation from an elastically coated plate with a discontinuity introduced by a signal conditioning plate

Yanni Zhang, Jie Pan

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

Underwater structural sound radiation and reflection can be reduced by adding an elastic coating to a structure. To increase the signal-to-noise ratio of a detecting hydrophone placed in front of the coating, a signal conditioning plate (SCP) of finite size placed between the coating and the hydrophone is proposed to increase the local reflection of incoming sound. This paper studies the effects of a SCP as a distributed discontinuity on the general properties of the sound radiation of a coated plate. The discontinuity introduced by the SCP changes the vibration and radiated sound power of the coated plate by scattering and reflecting structural waves in the coating. The trapped modal response of the structural waves is also observed and found to be responsible for the increase of sound and vibration of the plate at the corresponding resonance frequencies. © 2013 Acoustical Society of America.
Original languageEnglish
Pages (from-to)173-185
JournalJournal of the Acoustical Society of America
Volume133
Issue number1
DOIs
Publication statusPublished - 2013

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