Prediction of sound scattering and radiation using non-negative intensity

Daipei Liu, Herwig Peters, Nicole Kessissoglou, Steffen Marburg

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Non-negative intensity is a numerical technique based on acoustic radiation modes and using either the acoustic pressure or normal velocity on the surface of the structure, to identify the surface areas of a structure that contribute to sound power. In contrast to acoustic intensity, nonnegative intensity is always positive. In this work, both scattered and radiated sound of structures submerged in a heavy fluid medium are considered. For the scattering problem, several rigid structures corresponding to a sphere, a cylinder and a hemispherical shell under incident plane wave excitation are examined. For the radiation problem, several elastic structures corresponding to a spherical shell, a cylindrical shell and a hemispherical shell under point force excitation are considered. The scattered and radiated acoustic intensities and non-negative intensities of the aforementioned structures are calculated and compared.

Original languageEnglish
Title of host publicationICSV 2016 - 23rd International Congress on Sound and Vibration
Subtitle of host publicationFrom Ancient to Modern Acoustics
PublisherInternational Institute of Acoustics and Vibrations
ISBN (Electronic)9789609922623
StatePublished - 2016
Event23rd International Congress on Sound and Vibration, ICSV 2016 - Athens, Greece
Duration: 10 Jul 201614 Jul 2016

Publication series

NameICSV 2016 - 23rd International Congress on Sound and Vibration: From Ancient to Modern Acoustics

Conference

Conference23rd International Congress on Sound and Vibration, ICSV 2016
Country/TerritoryGreece
CityAthens
Period10/07/1614/07/16

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