Transmission of marine seismic survey, air gun array signals in Australian waters
Measurements of the transmission of seismic survey signals in Australian waters are presented. The measured transmission loss showed: high variability of received signal sound exposure level at similar ranges when comparing all surveys (mean of standard deviation across ranges of 3-12 dB); high vari...
| Main Authors: | , , , |
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| Format: | Conference Paper |
| Published: |
2016
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| Online Access: | http://hdl.handle.net/20.500.11937/56213 |
| _version_ | 1848759815576223744 |
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| author | McCauley, Robert Duncan, Alec Gavrilov, Alexander Cato, D. |
| author_facet | McCauley, Robert Duncan, Alec Gavrilov, Alexander Cato, D. |
| author_sort | McCauley, Robert |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Measurements of the transmission of seismic survey signals in Australian waters are presented. The measured transmission loss showed: high variability of received signal sound exposure level at similar ranges when comparing all surveys (mean of standard deviation across ranges of 3-12 dB); high variability within a seismic survey (mean of standard deviation at any range of 2-4 dB); typical shot-shot variability of 1-3 dB (mean of standard deviation at any range) possibly produced by gun strings moving around; the importance of bathymetry profiles, seabed types and sound speed profiles in determining air gun transmission; different transmission regimes for open ocean, continental shelf and shelf-slope environments; seismic source energy transmitted at longer ranges ( < 1 km) was most commonly dominated by low frequency ( < 500 Hz) energy and only at short range ( > 1 km) was high frequency energy observed; and that a considerable amount of air gun array energy may directly excite the seabed, couple into the seabed and travel horizontally, or by way of interface waves. For locations on the shelf or shelf slope around southern and Western Australia the presence of limestone or calcarenite seabed types are critical in accurately determining seismic signal transmission. |
| first_indexed | 2025-11-14T10:05:53Z |
| format | Conference Paper |
| id | curtin-20.500.11937-56213 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T10:05:53Z |
| publishDate | 2016 |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-562132017-08-24T02:22:50Z Transmission of marine seismic survey, air gun array signals in Australian waters McCauley, Robert Duncan, Alec Gavrilov, Alexander Cato, D. Measurements of the transmission of seismic survey signals in Australian waters are presented. The measured transmission loss showed: high variability of received signal sound exposure level at similar ranges when comparing all surveys (mean of standard deviation across ranges of 3-12 dB); high variability within a seismic survey (mean of standard deviation at any range of 2-4 dB); typical shot-shot variability of 1-3 dB (mean of standard deviation at any range) possibly produced by gun strings moving around; the importance of bathymetry profiles, seabed types and sound speed profiles in determining air gun transmission; different transmission regimes for open ocean, continental shelf and shelf-slope environments; seismic source energy transmitted at longer ranges ( < 1 km) was most commonly dominated by low frequency ( < 500 Hz) energy and only at short range ( > 1 km) was high frequency energy observed; and that a considerable amount of air gun array energy may directly excite the seabed, couple into the seabed and travel horizontally, or by way of interface waves. For locations on the shelf or shelf slope around southern and Western Australia the presence of limestone or calcarenite seabed types are critical in accurately determining seismic signal transmission. 2016 Conference Paper http://hdl.handle.net/20.500.11937/56213 restricted |
| spellingShingle | McCauley, Robert Duncan, Alec Gavrilov, Alexander Cato, D. Transmission of marine seismic survey, air gun array signals in Australian waters |
| title | Transmission of marine seismic survey, air gun array signals in Australian waters |
| title_full | Transmission of marine seismic survey, air gun array signals in Australian waters |
| title_fullStr | Transmission of marine seismic survey, air gun array signals in Australian waters |
| title_full_unstemmed | Transmission of marine seismic survey, air gun array signals in Australian waters |
| title_short | Transmission of marine seismic survey, air gun array signals in Australian waters |
| title_sort | transmission of marine seismic survey, air gun array signals in australian waters |
| url | http://hdl.handle.net/20.500.11937/56213 |