An Initial Assessment of Effects of Seafloor Roughnesson Coherent Sound Reflection from the Seafloor
A roughened seafloor may be expected to scatter incident sound at non-specular angles, but also to reflect coherently at the specular angle, with some loss of amplitude attributed to the scattering and some loss attributed to sound transmission into, and absorption within, the seafloor. Our initial...
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| Format: | Conference Paper |
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Australian Acoustical Society
2013
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| Online Access: | http://www.acoustics.asn.au/conference_proceedings/AAS2013/papers/p103.pdf http://hdl.handle.net/20.500.11937/20235 |
| _version_ | 1848750250156621824 |
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| author | Jones, A. Duncan, Alexander Maggi, Amos |
| author2 | Terrance McMinn |
| author_facet | Terrance McMinn Jones, A. Duncan, Alexander Maggi, Amos |
| author_sort | Jones, A. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | A roughened seafloor may be expected to scatter incident sound at non-specular angles, but also to reflect coherently at the specular angle, with some loss of amplitude attributed to the scattering and some loss attributed to sound transmission into, and absorption within, the seafloor. Our initial expectation was that a reasonable estimation of the total coherent reflection loss, at a given grazing angle, might be obtained simply from a combination of the loss attributed to a flat seafloor based on its geoacoustic properties, and the separate coherent loss due to the roughness scattering described for a pressure release surface. To test this hypothesis, loss values obtained using this simple additionof model outputs were produced for several seafloor material types with prescribed roughness profiles. These results are compared with loss values obtained using the perturbation approach for rough surface scattering from stratified media described by Kuperman and Schmidt (JASA, 86, Oct. 1989). The latter is a model which describes the coherent plane wave reflection from a rough surface of stratified material which has specified geoacoustic properties. |
| first_indexed | 2025-11-14T07:33:50Z |
| format | Conference Paper |
| id | curtin-20.500.11937-20235 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T07:33:50Z |
| publishDate | 2013 |
| publisher | Australian Acoustical Society |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-202352017-01-30T12:18:04Z An Initial Assessment of Effects of Seafloor Roughnesson Coherent Sound Reflection from the Seafloor Jones, A. Duncan, Alexander Maggi, Amos Terrance McMinn scatter roughened seafloor A roughened seafloor may be expected to scatter incident sound at non-specular angles, but also to reflect coherently at the specular angle, with some loss of amplitude attributed to the scattering and some loss attributed to sound transmission into, and absorption within, the seafloor. Our initial expectation was that a reasonable estimation of the total coherent reflection loss, at a given grazing angle, might be obtained simply from a combination of the loss attributed to a flat seafloor based on its geoacoustic properties, and the separate coherent loss due to the roughness scattering described for a pressure release surface. To test this hypothesis, loss values obtained using this simple additionof model outputs were produced for several seafloor material types with prescribed roughness profiles. These results are compared with loss values obtained using the perturbation approach for rough surface scattering from stratified media described by Kuperman and Schmidt (JASA, 86, Oct. 1989). The latter is a model which describes the coherent plane wave reflection from a rough surface of stratified material which has specified geoacoustic properties. 2013 Conference Paper http://hdl.handle.net/20.500.11937/20235 http://www.acoustics.asn.au/conference_proceedings/AAS2013/papers/p103.pdf Australian Acoustical Society restricted |
| spellingShingle | scatter roughened seafloor Jones, A. Duncan, Alexander Maggi, Amos An Initial Assessment of Effects of Seafloor Roughnesson Coherent Sound Reflection from the Seafloor |
| title | An Initial Assessment of Effects of Seafloor Roughnesson Coherent Sound Reflection from the Seafloor |
| title_full | An Initial Assessment of Effects of Seafloor Roughnesson Coherent Sound Reflection from the Seafloor |
| title_fullStr | An Initial Assessment of Effects of Seafloor Roughnesson Coherent Sound Reflection from the Seafloor |
| title_full_unstemmed | An Initial Assessment of Effects of Seafloor Roughnesson Coherent Sound Reflection from the Seafloor |
| title_short | An Initial Assessment of Effects of Seafloor Roughnesson Coherent Sound Reflection from the Seafloor |
| title_sort | initial assessment of effects of seafloor roughnesson coherent sound reflection from the seafloor |
| topic | scatter roughened seafloor |
| url | http://www.acoustics.asn.au/conference_proceedings/AAS2013/papers/p103.pdf http://hdl.handle.net/20.500.11937/20235 |