Acoustic design of a local scatterer in a phase-space

John J. McCoy, Ben Zion Steinberg

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

Abstract

A spatially local region of mechanical property heterogeneity is a source of scattering, by which a structureborne mechanical wavefield is released as sound, to a surrounding fiuid. We consider the case of a scatterer which is of the order of the size of the wavelength of a plate-wave field for a frequency which is below coincidence. A design strategy for reducing the strength of the scattered sound field in the fluid, at far-field distances from the scatterer, by adding a small-scale structure to the heterogenity, is presented. The design is accomplished in a wavelet-based phase-space. Emphasized is a significant distinction required of the added structure, depending on the heterogeneity applying to a measure of the local mass density or the local bending stiffness.

Original languageEnglish
Title of host publication15th Biennial Conference on Mechanical Vibration and Noise - Acoustics, Vibrations, and Rotating Machines
PublisherAmerican Society of Mechanical Engineers (ASME)
Pages301-305
Number of pages5
ISBN (Electronic)9780791897652
DOIs
StatePublished - 1995
EventASME 1995 Design Engineering Technical Conferences, DETC 1995, collocated with the ASME 1995 15th International Computers in Engineering Conference and the ASME 1995 9th Annual Engineering Database Symposium - Boston, United States
Duration: 17 Sep 199520 Sep 1995

Publication series

NameProceedings of the ASME Design Engineering Technical Conference
Volume3B-1995

Conference

ConferenceASME 1995 Design Engineering Technical Conferences, DETC 1995, collocated with the ASME 1995 15th International Computers in Engineering Conference and the ASME 1995 9th Annual Engineering Database Symposium
Country/TerritoryUnited States
CityBoston
Period17/09/9520/09/95

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