In-Air Evoked Potential Audiometry of Grey Seals (Halichoerus grypus) from the North and Baltic Seas
In-air anthropogenic sound has the potential to affect grey seal (Halichoerus grypus) behaviour and interfere with acoustic communication. In this study, a new method was used to deliver acoustic signals to grey seals as part of an in-air hearing assessment. Using in-ear headphones with adapted ear...
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2014
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Online Access: | https://research.wur.nl/en/publications/in-air-evoked-potential-audiometry-of-grey-seals-halichoerus-gryp https://doi.org/10.1371/journal.pone.0090824 |
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ftunivwagenin:oai:library.wur.nl:wurpubs/452465 2024-01-21T10:09:40+01:00 In-Air Evoked Potential Audiometry of Grey Seals (Halichoerus grypus) from the North and Baltic Seas Ruser, A. Daehne, M. Sundermeyer, J. Lucke, K. Houser, D.S. Finneran, J.J. Driver, J. Pawliczka, I. Rosenberger, T. Siebert, U. 2014 application/pdf https://research.wur.nl/en/publications/in-air-evoked-potential-audiometry-of-grey-seals-halichoerus-gryp https://doi.org/10.1371/journal.pone.0090824 en eng https://edepot.wur.nl/298139 https://research.wur.nl/en/publications/in-air-evoked-potential-audiometry-of-grey-seals-halichoerus-gryp doi:10.1371/journal.pone.0090824 info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by/4.0/ Wageningen University & Research PLoS ONE 9 (2014) 3 ISSN: 1932-6203 amphibious hearing harbor seals hearing sensitivity lion zalophus-californianus mirounga-angustirostris phoca-vitulina pinnipeds temporary threshold shift tursiops-truncatus underwater info:eu-repo/semantics/article Article/Letter to editor info:eu-repo/semantics/publishedVersion 2014 ftunivwagenin https://doi.org/10.1371/journal.pone.0090824 2023-12-27T23:14:45Z In-air anthropogenic sound has the potential to affect grey seal (Halichoerus grypus) behaviour and interfere with acoustic communication. In this study, a new method was used to deliver acoustic signals to grey seals as part of an in-air hearing assessment. Using in-ear headphones with adapted ear inserts allowed for the measurement of auditory brainstem responses (ABR) on sedated grey seals exposed to 5-cycle (2-1-2) tone pips. Thresholds were measured at 10 frequencies between 1–20 kHz. Measurements were made using subcutaneous electrodes on wild seals from the Baltic and North Seas. Thresholds were determined by both visual and statistical approaches (single point F-test) and good agreement was obtained between the results using both methods. The mean auditory thresholds were =40 dB re 20 µPa peak equivalent sound pressure level (peSPL) between 4–20 kHz and showed similar patterns to in-air behavioural hearing tests of other phocid seals between 3 and 20 kHz. Below 3 kHz, a steep reduction in hearing sensitivity was observed, which differed from the rate of decline in sensitivity obtained in behavioural studies on other phocids. Differences in the rate of decline may reflect influence of the ear inserts on the ability to reliably transmit lower frequencies or interference from the structure of the distal end of the ear canal. Article in Journal/Newspaper Phoca vitulina Wageningen UR (University & Research Centre): Digital Library PLoS ONE 9 3 e90824 |
institution |
Open Polar |
collection |
Wageningen UR (University & Research Centre): Digital Library |
op_collection_id |
ftunivwagenin |
language |
English |
topic |
amphibious hearing harbor seals hearing sensitivity lion zalophus-californianus mirounga-angustirostris phoca-vitulina pinnipeds temporary threshold shift tursiops-truncatus underwater |
spellingShingle |
amphibious hearing harbor seals hearing sensitivity lion zalophus-californianus mirounga-angustirostris phoca-vitulina pinnipeds temporary threshold shift tursiops-truncatus underwater Ruser, A. Daehne, M. Sundermeyer, J. Lucke, K. Houser, D.S. Finneran, J.J. Driver, J. Pawliczka, I. Rosenberger, T. Siebert, U. In-Air Evoked Potential Audiometry of Grey Seals (Halichoerus grypus) from the North and Baltic Seas |
topic_facet |
amphibious hearing harbor seals hearing sensitivity lion zalophus-californianus mirounga-angustirostris phoca-vitulina pinnipeds temporary threshold shift tursiops-truncatus underwater |
description |
In-air anthropogenic sound has the potential to affect grey seal (Halichoerus grypus) behaviour and interfere with acoustic communication. In this study, a new method was used to deliver acoustic signals to grey seals as part of an in-air hearing assessment. Using in-ear headphones with adapted ear inserts allowed for the measurement of auditory brainstem responses (ABR) on sedated grey seals exposed to 5-cycle (2-1-2) tone pips. Thresholds were measured at 10 frequencies between 1–20 kHz. Measurements were made using subcutaneous electrodes on wild seals from the Baltic and North Seas. Thresholds were determined by both visual and statistical approaches (single point F-test) and good agreement was obtained between the results using both methods. The mean auditory thresholds were =40 dB re 20 µPa peak equivalent sound pressure level (peSPL) between 4–20 kHz and showed similar patterns to in-air behavioural hearing tests of other phocid seals between 3 and 20 kHz. Below 3 kHz, a steep reduction in hearing sensitivity was observed, which differed from the rate of decline in sensitivity obtained in behavioural studies on other phocids. Differences in the rate of decline may reflect influence of the ear inserts on the ability to reliably transmit lower frequencies or interference from the structure of the distal end of the ear canal. |
format |
Article in Journal/Newspaper |
author |
Ruser, A. Daehne, M. Sundermeyer, J. Lucke, K. Houser, D.S. Finneran, J.J. Driver, J. Pawliczka, I. Rosenberger, T. Siebert, U. |
author_facet |
Ruser, A. Daehne, M. Sundermeyer, J. Lucke, K. Houser, D.S. Finneran, J.J. Driver, J. Pawliczka, I. Rosenberger, T. Siebert, U. |
author_sort |
Ruser, A. |
title |
In-Air Evoked Potential Audiometry of Grey Seals (Halichoerus grypus) from the North and Baltic Seas |
title_short |
In-Air Evoked Potential Audiometry of Grey Seals (Halichoerus grypus) from the North and Baltic Seas |
title_full |
In-Air Evoked Potential Audiometry of Grey Seals (Halichoerus grypus) from the North and Baltic Seas |
title_fullStr |
In-Air Evoked Potential Audiometry of Grey Seals (Halichoerus grypus) from the North and Baltic Seas |
title_full_unstemmed |
In-Air Evoked Potential Audiometry of Grey Seals (Halichoerus grypus) from the North and Baltic Seas |
title_sort |
in-air evoked potential audiometry of grey seals (halichoerus grypus) from the north and baltic seas |
publishDate |
2014 |
url |
https://research.wur.nl/en/publications/in-air-evoked-potential-audiometry-of-grey-seals-halichoerus-gryp https://doi.org/10.1371/journal.pone.0090824 |
genre |
Phoca vitulina |
genre_facet |
Phoca vitulina |
op_source |
PLoS ONE 9 (2014) 3 ISSN: 1932-6203 |
op_relation |
https://edepot.wur.nl/298139 https://research.wur.nl/en/publications/in-air-evoked-potential-audiometry-of-grey-seals-halichoerus-gryp doi:10.1371/journal.pone.0090824 |
op_rights |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by/4.0/ Wageningen University & Research |
op_doi |
https://doi.org/10.1371/journal.pone.0090824 |
container_title |
PLoS ONE |
container_volume |
9 |
container_issue |
3 |
container_start_page |
e90824 |
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1788700771504619520 |