Underwater audiogram of a Pacific walrus (Odobenus rosmarus divergens) measured with narrow-band frequency-modulated signals
The underwater hearing sensitivity of an 18-year-old male Pacific walrus was measured in a pool by using a go/no-go response paradigm and the up-down staircase method. Auditory sensitivity was measured using narrow-band, frequency-modulated signals (1500 ms duration) with center frequencies ranging...
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2002
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Online Access: | https://research.wur.nl/en/publications/underwater-audiogram-of-a-pacific-walrus-odobenus-rosmarus-diverg https://doi.org/10.1121/1.1508783 |
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ftunivwagenin:oai:library.wur.nl:wurpubs/317295 2024-01-28T10:08:25+01:00 Underwater audiogram of a Pacific walrus (Odobenus rosmarus divergens) measured with narrow-band frequency-modulated signals Kastelein, R.A. Mosterd, P. van Santen, B. Hagedoorn, M. de Haan, D. 2002 text/html https://research.wur.nl/en/publications/underwater-audiogram-of-a-pacific-walrus-odobenus-rosmarus-diverg https://doi.org/10.1121/1.1508783 en eng https://edepot.wur.nl/54433 https://research.wur.nl/en/publications/underwater-audiogram-of-a-pacific-walrus-odobenus-rosmarus-diverg doi:10.1121/1.1508783 info:eu-repo/semantics/restrictedAccess Wageningen University & Research Journal of the Acoustical Society of America 112 (2002) 5 ISSN: 0001-4966 Life Science info:eu-repo/semantics/article Article/Letter to editor info:eu-repo/semantics/publishedVersion 2002 ftunivwagenin https://doi.org/10.1121/1.1508783 2024-01-03T23:16:32Z The underwater hearing sensitivity of an 18-year-old male Pacific walrus was measured in a pool by using a go/no-go response paradigm and the up-down staircase method. Auditory sensitivity was measured using narrow-band, frequency-modulated signals (1500 ms duration) with center frequencies ranging from 0.125 to 15 kHz. The resulting underwater audiogram (50 The range of best hearing (10 dB from the maximum sensitivity) was from 1 to 12 kHz. Sensitivity fell gradually below 1 kHz and dropped off sharply above 12 kHz. The animal showed a peculiar insensitivity for 2 kHz signals. His much higher sensitivity for 1.5- and 3-kHz signals indicated that this is a narrow-band phenomenon. Walrus hearing is relatively sensitive to low frequency sound, thus the species is likely to be susceptible to anthropogenic noise. The thresholds found during a small test with four frequencies with signal durations of 300 ms did not differ significantly from those obtained with signal durations of 1500 ms. Article in Journal/Newspaper Odobenus rosmarus walrus* Wageningen UR (University & Research Centre): Digital Library Pacific The Journal of the Acoustical Society of America 112 5 2173 2182 |
institution |
Open Polar |
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Wageningen UR (University & Research Centre): Digital Library |
op_collection_id |
ftunivwagenin |
language |
English |
topic |
Life Science |
spellingShingle |
Life Science Kastelein, R.A. Mosterd, P. van Santen, B. Hagedoorn, M. de Haan, D. Underwater audiogram of a Pacific walrus (Odobenus rosmarus divergens) measured with narrow-band frequency-modulated signals |
topic_facet |
Life Science |
description |
The underwater hearing sensitivity of an 18-year-old male Pacific walrus was measured in a pool by using a go/no-go response paradigm and the up-down staircase method. Auditory sensitivity was measured using narrow-band, frequency-modulated signals (1500 ms duration) with center frequencies ranging from 0.125 to 15 kHz. The resulting underwater audiogram (50 The range of best hearing (10 dB from the maximum sensitivity) was from 1 to 12 kHz. Sensitivity fell gradually below 1 kHz and dropped off sharply above 12 kHz. The animal showed a peculiar insensitivity for 2 kHz signals. His much higher sensitivity for 1.5- and 3-kHz signals indicated that this is a narrow-band phenomenon. Walrus hearing is relatively sensitive to low frequency sound, thus the species is likely to be susceptible to anthropogenic noise. The thresholds found during a small test with four frequencies with signal durations of 300 ms did not differ significantly from those obtained with signal durations of 1500 ms. |
format |
Article in Journal/Newspaper |
author |
Kastelein, R.A. Mosterd, P. van Santen, B. Hagedoorn, M. de Haan, D. |
author_facet |
Kastelein, R.A. Mosterd, P. van Santen, B. Hagedoorn, M. de Haan, D. |
author_sort |
Kastelein, R.A. |
title |
Underwater audiogram of a Pacific walrus (Odobenus rosmarus divergens) measured with narrow-band frequency-modulated signals |
title_short |
Underwater audiogram of a Pacific walrus (Odobenus rosmarus divergens) measured with narrow-band frequency-modulated signals |
title_full |
Underwater audiogram of a Pacific walrus (Odobenus rosmarus divergens) measured with narrow-band frequency-modulated signals |
title_fullStr |
Underwater audiogram of a Pacific walrus (Odobenus rosmarus divergens) measured with narrow-band frequency-modulated signals |
title_full_unstemmed |
Underwater audiogram of a Pacific walrus (Odobenus rosmarus divergens) measured with narrow-band frequency-modulated signals |
title_sort |
underwater audiogram of a pacific walrus (odobenus rosmarus divergens) measured with narrow-band frequency-modulated signals |
publishDate |
2002 |
url |
https://research.wur.nl/en/publications/underwater-audiogram-of-a-pacific-walrus-odobenus-rosmarus-diverg https://doi.org/10.1121/1.1508783 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Odobenus rosmarus walrus* |
genre_facet |
Odobenus rosmarus walrus* |
op_source |
Journal of the Acoustical Society of America 112 (2002) 5 ISSN: 0001-4966 |
op_relation |
https://edepot.wur.nl/54433 https://research.wur.nl/en/publications/underwater-audiogram-of-a-pacific-walrus-odobenus-rosmarus-diverg doi:10.1121/1.1508783 |
op_rights |
info:eu-repo/semantics/restrictedAccess Wageningen University & Research |
op_doi |
https://doi.org/10.1121/1.1508783 |
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The Journal of the Acoustical Society of America |
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112 |
container_issue |
5 |
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2173 |
op_container_end_page |
2182 |
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