Sound Scattering by an Elastic Spherical Shell and its Cancellation using a Multi-pole Approach
The scattering and transmission of sound by an elastic spherical shell is considered when it is subject to an incoming monochromatic planar wave. It is aimed to cancel the sound scattering using combinations of multi-pole sources located at the centre of a shell filled with compressible fluid. Assum...
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| Format: | Article |
| Language: | English |
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Institute of Fundamental Technological Research Polish Academy of Sciences
2017-11-01
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| Series: | Archives of Acoustics |
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| Online Access: | https://acoustics.ippt.pan.pl/index.php/aa/article/view/2035 |
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| author | Eldad Jitzchak AVITAL Neeshtha Devi BHOLAH Giuseppe Cortez GIOVANELLI Touvia MILOH |
| author_facet | Eldad Jitzchak AVITAL Neeshtha Devi BHOLAH Giuseppe Cortez GIOVANELLI Touvia MILOH |
| author_sort | Eldad Jitzchak AVITAL |
| collection | DOAJ |
| description | The scattering and transmission of sound by an elastic spherical shell is considered when it is subject to an incoming monochromatic planar wave. It is aimed to cancel the sound scattering using combinations of multi-pole sources located at the centre of a shell filled with compressible fluid. Assuming linear acoustics and structural dynamics, exact solutions are derived for total elimination of the sound scattering for three cases: a free-space, near a hard ground or near a free-surface, where in the last two cases it is assumed
that the incoming wave propagates normal to the interface to maximize sound reflection back unto the source of the incoming wave. An elastic spherical shell of 1 m radius embedded in water and filled with air or oil is analysed to show the dominance of low-mode numbers for frequencies of less than 10 kHz and thus demonstrate the ability of this approach to damp acoustic scattering by means of low-order multi-poles inside the shell. Contour and mode distribution plots are also given and analysed. |
| format | Article |
| id | doaj-art-47e4e69536c141dfa4e20db2f3c639a4 |
| institution | Kabale University |
| issn | 0137-5075 2300-262X |
| language | English |
| publishDate | 2017-11-01 |
| publisher | Institute of Fundamental Technological Research Polish Academy of Sciences |
| record_format | Article |
| series | Archives of Acoustics |
| spelling | doaj-art-47e4e69536c141dfa4e20db2f3c639a42025-08-20T03:56:13ZengInstitute of Fundamental Technological Research Polish Academy of SciencesArchives of Acoustics0137-50752300-262X2017-11-0142410.1515/aoa-2017-0072Sound Scattering by an Elastic Spherical Shell and its Cancellation using a Multi-pole ApproachEldad Jitzchak AVITAL0Neeshtha Devi BHOLAH1Giuseppe Cortez GIOVANELLI2Touvia MILOH3Queen Mary University of LondonQueen Mary University of LondonFederal University of Rio de JaneiroTel Aviv University, Ramat Aviv IsraelThe scattering and transmission of sound by an elastic spherical shell is considered when it is subject to an incoming monochromatic planar wave. It is aimed to cancel the sound scattering using combinations of multi-pole sources located at the centre of a shell filled with compressible fluid. Assuming linear acoustics and structural dynamics, exact solutions are derived for total elimination of the sound scattering for three cases: a free-space, near a hard ground or near a free-surface, where in the last two cases it is assumed that the incoming wave propagates normal to the interface to maximize sound reflection back unto the source of the incoming wave. An elastic spherical shell of 1 m radius embedded in water and filled with air or oil is analysed to show the dominance of low-mode numbers for frequencies of less than 10 kHz and thus demonstrate the ability of this approach to damp acoustic scattering by means of low-order multi-poles inside the shell. Contour and mode distribution plots are also given and analysed.https://acoustics.ippt.pan.pl/index.php/aa/article/view/2035sound scatteringstructural dynamicssound cancellation |
| spellingShingle | Eldad Jitzchak AVITAL Neeshtha Devi BHOLAH Giuseppe Cortez GIOVANELLI Touvia MILOH Sound Scattering by an Elastic Spherical Shell and its Cancellation using a Multi-pole Approach Archives of Acoustics sound scattering structural dynamics sound cancellation |
| title | Sound Scattering by an Elastic Spherical Shell and its Cancellation using a Multi-pole Approach |
| title_full | Sound Scattering by an Elastic Spherical Shell and its Cancellation using a Multi-pole Approach |
| title_fullStr | Sound Scattering by an Elastic Spherical Shell and its Cancellation using a Multi-pole Approach |
| title_full_unstemmed | Sound Scattering by an Elastic Spherical Shell and its Cancellation using a Multi-pole Approach |
| title_short | Sound Scattering by an Elastic Spherical Shell and its Cancellation using a Multi-pole Approach |
| title_sort | sound scattering by an elastic spherical shell and its cancellation using a multi pole approach |
| topic | sound scattering structural dynamics sound cancellation |
| url | https://acoustics.ippt.pan.pl/index.php/aa/article/view/2035 |
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