Efficient modelling of mid to high frequency underwater acoustic propagation
Accurate prediction of the acoustic interference field at mid to high frequencies is computationally intensive, even for ray theory based models, and is of little practical use because the fine detail of the interference pattern is sensitive to the exact values of environmental parameters, such as b...
| Main Authors: | , , |
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| Other Authors: | |
| Format: | Conference Paper |
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Australian Acoustical Society
2013
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| Subjects: | |
| Online Access: | http://www.acoustics.asn.au/conference_proceedings/AAS2013/papers/p69.pdf http://hdl.handle.net/20.500.11937/34698 |
| _version_ | 1848754294276227072 |
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| author | Duncan, Alexander Parnum, Iain Henley, Peter |
| author2 | Terrance McMinn |
| author_facet | Terrance McMinn Duncan, Alexander Parnum, Iain Henley, Peter |
| author_sort | Duncan, Alexander |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Accurate prediction of the acoustic interference field at mid to high frequencies is computationally intensive, even for ray theory based models, and is of little practical use because the fine detail of the interference pattern is sensitive to the exact values of environmental parameters, such as bathymetry and sound speed, that are inherently uncertain. This paper considers an alternative approach in which a much faster incoherent beam model is used to compute the mean acoustic field, and the interference is treated as a statistical process based on a Rayleigh amplitude distribution. Excellent agreement was found between interference field statistics obtained using this hybrid approach, and those resulting from a full coherent transmission loss calculation whenever the horizontal separation between source and receiver was sufficiently large that there were many contributing ray paths. |
| first_indexed | 2025-11-14T08:38:07Z |
| format | Conference Paper |
| id | curtin-20.500.11937-34698 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T08:38:07Z |
| publishDate | 2013 |
| publisher | Australian Acoustical Society |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-346982017-01-30T13:45:06Z Efficient modelling of mid to high frequency underwater acoustic propagation Duncan, Alexander Parnum, Iain Henley, Peter Terrance McMinn Rayleigh acoustics bathymetry Accurate prediction of the acoustic interference field at mid to high frequencies is computationally intensive, even for ray theory based models, and is of little practical use because the fine detail of the interference pattern is sensitive to the exact values of environmental parameters, such as bathymetry and sound speed, that are inherently uncertain. This paper considers an alternative approach in which a much faster incoherent beam model is used to compute the mean acoustic field, and the interference is treated as a statistical process based on a Rayleigh amplitude distribution. Excellent agreement was found between interference field statistics obtained using this hybrid approach, and those resulting from a full coherent transmission loss calculation whenever the horizontal separation between source and receiver was sufficiently large that there were many contributing ray paths. 2013 Conference Paper http://hdl.handle.net/20.500.11937/34698 http://www.acoustics.asn.au/conference_proceedings/AAS2013/papers/p69.pdf Australian Acoustical Society restricted |
| spellingShingle | Rayleigh acoustics bathymetry Duncan, Alexander Parnum, Iain Henley, Peter Efficient modelling of mid to high frequency underwater acoustic propagation |
| title | Efficient modelling of mid to high frequency underwater acoustic propagation |
| title_full | Efficient modelling of mid to high frequency underwater acoustic propagation |
| title_fullStr | Efficient modelling of mid to high frequency underwater acoustic propagation |
| title_full_unstemmed | Efficient modelling of mid to high frequency underwater acoustic propagation |
| title_short | Efficient modelling of mid to high frequency underwater acoustic propagation |
| title_sort | efficient modelling of mid to high frequency underwater acoustic propagation |
| topic | Rayleigh acoustics bathymetry |
| url | http://www.acoustics.asn.au/conference_proceedings/AAS2013/papers/p69.pdf http://hdl.handle.net/20.500.11937/34698 |