Effects of subsampling of passive acoustic recordings on acoustic metrics
Passive acoustic monitoring is an important tool in marine mammal studies. However, logistics and finances frequently constrain the number and servicing schedules of acoustic recorders, requiring a trade-off between deployment periods and sampling continuity, i.e., the implementation of a subsamplin...
Published in: | The Journal of the Acoustical Society of America |
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ACOUSTICAL SOC AMER AMER INST PHYSICS
2015
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Online Access: | https://epic.awi.de/id/eprint/38463/ https://epic.awi.de/id/eprint/38463/1/Thomisch_etal_2015_Effects_of_subsampling_of_passive_acoustic_recordings_on_acoustic_metrics.pdf https://hdl.handle.net/10013/epic.45823 https://hdl.handle.net/10013/epic.45823.d001 |
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ftawi:oai:epic.awi.de:38463 2023-05-15T15:37:10+02:00 Effects of subsampling of passive acoustic recordings on acoustic metrics Thomisch, Karolin Boebel, Olaf Zitterbart, Daniel Samaran, Flore Van Parijs, Sofie van Opzeeland, Ilse 2015 application/pdf https://epic.awi.de/id/eprint/38463/ https://epic.awi.de/id/eprint/38463/1/Thomisch_etal_2015_Effects_of_subsampling_of_passive_acoustic_recordings_on_acoustic_metrics.pdf https://hdl.handle.net/10013/epic.45823 https://hdl.handle.net/10013/epic.45823.d001 unknown ACOUSTICAL SOC AMER AMER INST PHYSICS https://epic.awi.de/id/eprint/38463/1/Thomisch_etal_2015_Effects_of_subsampling_of_passive_acoustic_recordings_on_acoustic_metrics.pdf https://hdl.handle.net/10013/epic.45823.d001 Thomisch, K. orcid:0000-0002-7144-8369 , Boebel, O. orcid:0000-0002-2259-0035 , Zitterbart, D. , Samaran, F. , Van Parijs, S. and van Opzeeland, I. (2015) Effects of subsampling of passive acoustic recordings on acoustic metrics , Journal of the Acoustical Society of America, 138 (1), pp. 267-278 . doi:10.1121/1.4922703 <https://doi.org/10.1121/1.4922703> , hdl:10013/epic.45823 EPIC3Journal of the Acoustical Society of America, ACOUSTICAL SOC AMER AMER INST PHYSICS, 138(1), pp. 267-278, ISSN: 0001-4966 Article isiRev 2015 ftawi https://doi.org/10.1121/1.4922703 2021-12-24T15:40:37Z Passive acoustic monitoring is an important tool in marine mammal studies. However, logistics and finances frequently constrain the number and servicing schedules of acoustic recorders, requiring a trade-off between deployment periods and sampling continuity, i.e., the implementation of a subsampling scheme. Optimizing such schemes to each project's specific research questions is desirable. This study investigates the impact of subsampling on the accuracy of two common metrics, acoustic presence and call rate, for different vocalization patterns (regimes) of baleen whales: (1) variable vocal activity, (2) vocalizations organized in song bouts, and (3) vocal activity with diel patterns. To this end, above metrics are compared for continuous and subsampled data subject to different sampling strategies, covering duty cycles between 50% and 2%. The results show that a reduction of the duty cycle impacts negatively on the accuracy of both acoustic presence and call rate estimates. For a given duty cycle, frequent short listening periods improve accuracy of daily acoustic presence estimates over few long listening periods. Overall, subsampling effects are most pronounced for low and/or temporally clustered vocal activity. These findings illustrate the importance of informed decisions when applying subsampling strategies to passive acoustic recordings or analyses for a given target species. Article in Journal/Newspaper baleen whales Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) The Journal of the Acoustical Society of America 138 1 267 278 |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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ftawi |
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description |
Passive acoustic monitoring is an important tool in marine mammal studies. However, logistics and finances frequently constrain the number and servicing schedules of acoustic recorders, requiring a trade-off between deployment periods and sampling continuity, i.e., the implementation of a subsampling scheme. Optimizing such schemes to each project's specific research questions is desirable. This study investigates the impact of subsampling on the accuracy of two common metrics, acoustic presence and call rate, for different vocalization patterns (regimes) of baleen whales: (1) variable vocal activity, (2) vocalizations organized in song bouts, and (3) vocal activity with diel patterns. To this end, above metrics are compared for continuous and subsampled data subject to different sampling strategies, covering duty cycles between 50% and 2%. The results show that a reduction of the duty cycle impacts negatively on the accuracy of both acoustic presence and call rate estimates. For a given duty cycle, frequent short listening periods improve accuracy of daily acoustic presence estimates over few long listening periods. Overall, subsampling effects are most pronounced for low and/or temporally clustered vocal activity. These findings illustrate the importance of informed decisions when applying subsampling strategies to passive acoustic recordings or analyses for a given target species. |
format |
Article in Journal/Newspaper |
author |
Thomisch, Karolin Boebel, Olaf Zitterbart, Daniel Samaran, Flore Van Parijs, Sofie van Opzeeland, Ilse |
spellingShingle |
Thomisch, Karolin Boebel, Olaf Zitterbart, Daniel Samaran, Flore Van Parijs, Sofie van Opzeeland, Ilse Effects of subsampling of passive acoustic recordings on acoustic metrics |
author_facet |
Thomisch, Karolin Boebel, Olaf Zitterbart, Daniel Samaran, Flore Van Parijs, Sofie van Opzeeland, Ilse |
author_sort |
Thomisch, Karolin |
title |
Effects of subsampling of passive acoustic recordings on acoustic metrics |
title_short |
Effects of subsampling of passive acoustic recordings on acoustic metrics |
title_full |
Effects of subsampling of passive acoustic recordings on acoustic metrics |
title_fullStr |
Effects of subsampling of passive acoustic recordings on acoustic metrics |
title_full_unstemmed |
Effects of subsampling of passive acoustic recordings on acoustic metrics |
title_sort |
effects of subsampling of passive acoustic recordings on acoustic metrics |
publisher |
ACOUSTICAL SOC AMER AMER INST PHYSICS |
publishDate |
2015 |
url |
https://epic.awi.de/id/eprint/38463/ https://epic.awi.de/id/eprint/38463/1/Thomisch_etal_2015_Effects_of_subsampling_of_passive_acoustic_recordings_on_acoustic_metrics.pdf https://hdl.handle.net/10013/epic.45823 https://hdl.handle.net/10013/epic.45823.d001 |
genre |
baleen whales |
genre_facet |
baleen whales |
op_source |
EPIC3Journal of the Acoustical Society of America, ACOUSTICAL SOC AMER AMER INST PHYSICS, 138(1), pp. 267-278, ISSN: 0001-4966 |
op_relation |
https://epic.awi.de/id/eprint/38463/1/Thomisch_etal_2015_Effects_of_subsampling_of_passive_acoustic_recordings_on_acoustic_metrics.pdf https://hdl.handle.net/10013/epic.45823.d001 Thomisch, K. orcid:0000-0002-7144-8369 , Boebel, O. orcid:0000-0002-2259-0035 , Zitterbart, D. , Samaran, F. , Van Parijs, S. and van Opzeeland, I. (2015) Effects of subsampling of passive acoustic recordings on acoustic metrics , Journal of the Acoustical Society of America, 138 (1), pp. 267-278 . doi:10.1121/1.4922703 <https://doi.org/10.1121/1.4922703> , hdl:10013/epic.45823 |
op_doi |
https://doi.org/10.1121/1.4922703 |
container_title |
The Journal of the Acoustical Society of America |
container_volume |
138 |
container_issue |
1 |
container_start_page |
267 |
op_container_end_page |
278 |
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1766367621584781312 |