Initial Quantification of Low Frequency Masking Potential of a seismic survey
A distant seismic survey was recorded on 3 autonomous long term acoustic recorders deployed between Tasmania and the Antarctic continent. These instruments were located approximately 450, 1500, and 2800km from the survey site. Recordings were analyzed for the presence of airgun signals with sound fi...
| Main Authors: | , |
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| Format: | Report |
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International Whaling Commission
2010
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| Online Access: | http://hdl.handle.net/20.500.11937/80309 |
| _version_ | 1848764194829107200 |
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| author | McCauley, Robert Gedamke, Jason |
| author_facet | McCauley, Robert Gedamke, Jason |
| author_sort | McCauley, Robert |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | A distant seismic survey was recorded on 3 autonomous long term acoustic recorders deployed between Tasmania and the Antarctic continent. These instruments were located approximately 450, 1500, and 2800km from the survey site. Recordings were analyzed for the presence of airgun signals with sound files from a five day period separated into 'seismic' vs. 'non-seismic' files for acoustic analysis. Sound levels across a 20-50Hz bandwidth were calculated for 1s samples and compared between the seismic and non-seismic datasets to assess the percentage of time that sound levels increased due to the presence of airgun signals. During seismic operations, a distinct shift in the distribution of sound pressure levels in the 1s samples occurred suggesting even during 'quiet' periods between shots, sound levels remained slightly elevated. Here we present results quantifying the received levels of seismic airgun shots, and the percentages of time that sound levels are elevated at varying distances from a seismic survey. |
| first_indexed | 2025-11-14T11:15:29Z |
| format | Report |
| id | curtin-20.500.11937-80309 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T11:15:29Z |
| publishDate | 2010 |
| publisher | International Whaling Commission |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-803092020-10-29T05:19:59Z Initial Quantification of Low Frequency Masking Potential of a seismic survey McCauley, Robert Gedamke, Jason Yes A distant seismic survey was recorded on 3 autonomous long term acoustic recorders deployed between Tasmania and the Antarctic continent. These instruments were located approximately 450, 1500, and 2800km from the survey site. Recordings were analyzed for the presence of airgun signals with sound files from a five day period separated into 'seismic' vs. 'non-seismic' files for acoustic analysis. Sound levels across a 20-50Hz bandwidth were calculated for 1s samples and compared between the seismic and non-seismic datasets to assess the percentage of time that sound levels increased due to the presence of airgun signals. During seismic operations, a distinct shift in the distribution of sound pressure levels in the 1s samples occurred suggesting even during 'quiet' periods between shots, sound levels remained slightly elevated. Here we present results quantifying the received levels of seismic airgun shots, and the percentages of time that sound levels are elevated at varying distances from a seismic survey. 2010 Report http://hdl.handle.net/20.500.11937/80309 International Whaling Commission fulltext |
| spellingShingle | Yes McCauley, Robert Gedamke, Jason Initial Quantification of Low Frequency Masking Potential of a seismic survey |
| title | Initial Quantification of Low Frequency Masking Potential of a seismic survey |
| title_full | Initial Quantification of Low Frequency Masking Potential of a seismic survey |
| title_fullStr | Initial Quantification of Low Frequency Masking Potential of a seismic survey |
| title_full_unstemmed | Initial Quantification of Low Frequency Masking Potential of a seismic survey |
| title_short | Initial Quantification of Low Frequency Masking Potential of a seismic survey |
| title_sort | initial quantification of low frequency masking potential of a seismic survey |
| topic | Yes |
| url | http://hdl.handle.net/20.500.11937/80309 |