Temporary shift in masked hearing thresholds in a harbor porpoise (Phocoena phocoena) after exposure to seismic airgun stimuli
An auditory study was conducted to derive data on temporary threshold shift TTS induced bysingle impulses. This information should serve as basis for the definition of noise exposurecriteria for harbor porpoises. The measurements of TTS were conducted on a harbor porpoise bymeasuring the auditory ev...
| Main Authors: | , , , |
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| Format: | Journal Article |
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Acoustical Soceity of America
2009
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| Online Access: | http://scitation.aip.org/content/asa/journal/jasa/125/6/10.1121/1.3117443 http://hdl.handle.net/20.500.11937/29119 |
| _version_ | 1848752719010988032 |
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| author | Lucke, Klaus Siebert, U. Lepper, P. Blanchet, M. |
| author_facet | Lucke, Klaus Siebert, U. Lepper, P. Blanchet, M. |
| author_sort | Lucke, Klaus |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | An auditory study was conducted to derive data on temporary threshold shift TTS induced bysingle impulses. This information should serve as basis for the definition of noise exposurecriteria for harbor porpoises. The measurements of TTS were conducted on a harbor porpoise bymeasuring the auditory evoked potentials in response to amplitude-modulated sounds. Afterobtaining baseline hearing data the animal was exposed to single airgun stimuli at increasingreceived levels. Immediately after each exposure the animal’s hearing threshold was tested forsignificant changes. The received levels of the airgun impulses were increased until TTS wasreached. At 4 kHz the predefined TTS criterion was exceeded at a received sound pressure level of199.7 dBpk-pk re 1 Pa and a sound exposure level SEL of 164.3 dB re 1 Pa2 s. The animalconsistently showed aversive behavioral reactions at received sound pressure levels above174 dBpk-pk re 1 Pa or a SEL of 145 dB re 1 Pa2 s. Elevated levels of baseline hearingsensitivity indicate potentially masked acoustic thresholds. Therefore, the resulting TTS levelsshould be considered masked temporary threshold shift MTTS levels. The MTTS levels are lowerthan for any other cetacean species tested so far. |
| first_indexed | 2025-11-14T08:13:05Z |
| format | Journal Article |
| id | curtin-20.500.11937-29119 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T08:13:05Z |
| publishDate | 2009 |
| publisher | Acoustical Soceity of America |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-291192017-02-28T01:44:34Z Temporary shift in masked hearing thresholds in a harbor porpoise (Phocoena phocoena) after exposure to seismic airgun stimuli Lucke, Klaus Siebert, U. Lepper, P. Blanchet, M. An auditory study was conducted to derive data on temporary threshold shift TTS induced bysingle impulses. This information should serve as basis for the definition of noise exposurecriteria for harbor porpoises. The measurements of TTS were conducted on a harbor porpoise bymeasuring the auditory evoked potentials in response to amplitude-modulated sounds. Afterobtaining baseline hearing data the animal was exposed to single airgun stimuli at increasingreceived levels. Immediately after each exposure the animal’s hearing threshold was tested forsignificant changes. The received levels of the airgun impulses were increased until TTS wasreached. At 4 kHz the predefined TTS criterion was exceeded at a received sound pressure level of199.7 dBpk-pk re 1 Pa and a sound exposure level SEL of 164.3 dB re 1 Pa2 s. The animalconsistently showed aversive behavioral reactions at received sound pressure levels above174 dBpk-pk re 1 Pa or a SEL of 145 dB re 1 Pa2 s. Elevated levels of baseline hearingsensitivity indicate potentially masked acoustic thresholds. Therefore, the resulting TTS levelsshould be considered masked temporary threshold shift MTTS levels. The MTTS levels are lowerthan for any other cetacean species tested so far. 2009 Journal Article http://hdl.handle.net/20.500.11937/29119 http://scitation.aip.org/content/asa/journal/jasa/125/6/10.1121/1.3117443 Acoustical Soceity of America restricted |
| spellingShingle | Lucke, Klaus Siebert, U. Lepper, P. Blanchet, M. Temporary shift in masked hearing thresholds in a harbor porpoise (Phocoena phocoena) after exposure to seismic airgun stimuli |
| title | Temporary shift in masked hearing thresholds in a harbor porpoise (Phocoena phocoena) after exposure to seismic airgun stimuli |
| title_full | Temporary shift in masked hearing thresholds in a harbor porpoise (Phocoena phocoena) after exposure to seismic airgun stimuli |
| title_fullStr | Temporary shift in masked hearing thresholds in a harbor porpoise (Phocoena phocoena) after exposure to seismic airgun stimuli |
| title_full_unstemmed | Temporary shift in masked hearing thresholds in a harbor porpoise (Phocoena phocoena) after exposure to seismic airgun stimuli |
| title_short | Temporary shift in masked hearing thresholds in a harbor porpoise (Phocoena phocoena) after exposure to seismic airgun stimuli |
| title_sort | temporary shift in masked hearing thresholds in a harbor porpoise (phocoena phocoena) after exposure to seismic airgun stimuli |
| url | http://scitation.aip.org/content/asa/journal/jasa/125/6/10.1121/1.3117443 http://hdl.handle.net/20.500.11937/29119 |