Acoustic localisation of wildlife with low-cost equipment: lower sensitivity, but no loss of precision
Context. Synchronised acoustic recorders can be used as a non-invasive tool to detect and localise sounds of interest, including vocal wildlife and anthropogenic sounds. Due to the high cost of commercial synchronised recorders, acoustic localisation has typically been restricted to small or well fu...
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2021
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Online Access: | https://doi.org/10.1071/WR21089 |
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ftbioone:10.1071/WR21089 2024-06-02T08:05:06+00:00 Acoustic localisation of wildlife with low-cost equipment: lower sensitivity, but no loss of precision Bethany R. Smith Holly Root-Gutteridge Hannah Butkiewicz Angela Dassow Amy C. Fontaine Andrew Markham Jessica Owens Loretta Schindler Matthew Wijers Arik Kershenbaum Bethany R. Smith Holly Root-Gutteridge Hannah Butkiewicz Angela Dassow Amy C. Fontaine Andrew Markham Jessica Owens Loretta Schindler Matthew Wijers Arik Kershenbaum world 2021-12-21 text/HTML https://doi.org/10.1071/WR21089 en eng CSIRO Publishing doi:10.1071/WR21089 All rights reserved. https://doi.org/10.1071/WR21089 acoustic localisation multilateration Text 2021 ftbioone https://doi.org/10.1071/WR21089 2024-05-07T00:50:12Z Context. Synchronised acoustic recorders can be used as a non-invasive tool to detect and localise sounds of interest, including vocal wildlife and anthropogenic sounds. Due to the high cost of commercial synchronised recorders, acoustic localisation has typically been restricted to small or well funded surveys. Recently, low-cost acoustic recorders have been developed, but until now their efficacy has not been compared with higher specification recorders. Aims. The present study aimed to compare the efficacy of a newly developed low-cost recorder, the Conservation at Range through Audio Classification and Localisation (CARACAL), with an established, high-end recorder, the Wildlife Acoustics Song Meter (SM). Methods. Four recorders of each type were deployed in a paired set-up across five nights in Wisconsin, USA. The recordings allowed for manual identification of domestic dog (Canis familiaris), grey wolf (Canis lupus), coyote (Canis latrans) and barred owl (Strix varia) calls, and then the ability of each recorder type to detect and localise the vocalising animals was compared. Key results. The CARACALs were less sensitive, detecting only 47.5% of wolf, 55% of coyote, 65% of barred owl and 82.5% of dog vocalisations detected by the paired SMs. However, when the same vocalisations were detected on both recorders, localisation was comparable, with no significant difference in the precision or maximum detection ranges. Conclusions. Low-cost recording equipment can be used effectively for acoustic localisation of both wild and domestic animals. However, the lower sensitivity of the CARACALs means that a denser network of these recorders would be needed to achieve the same efficacy as the SMs. Deploying a greater number of cheaper recorders increases the labour time in the field and the quantity of data to process and store. Thus, there is a trade-off between cost and time to be considered. Implications. The ability to use low-cost recorders for acoustic localisation provides new avenues for tracking, managing and ... Text Canis lupus BioOne Online Journals Wildlife Research 49 4 372 381 |
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collection |
BioOne Online Journals |
op_collection_id |
ftbioone |
language |
English |
topic |
acoustic localisation multilateration |
spellingShingle |
acoustic localisation multilateration Bethany R. Smith Holly Root-Gutteridge Hannah Butkiewicz Angela Dassow Amy C. Fontaine Andrew Markham Jessica Owens Loretta Schindler Matthew Wijers Arik Kershenbaum Acoustic localisation of wildlife with low-cost equipment: lower sensitivity, but no loss of precision |
topic_facet |
acoustic localisation multilateration |
description |
Context. Synchronised acoustic recorders can be used as a non-invasive tool to detect and localise sounds of interest, including vocal wildlife and anthropogenic sounds. Due to the high cost of commercial synchronised recorders, acoustic localisation has typically been restricted to small or well funded surveys. Recently, low-cost acoustic recorders have been developed, but until now their efficacy has not been compared with higher specification recorders. Aims. The present study aimed to compare the efficacy of a newly developed low-cost recorder, the Conservation at Range through Audio Classification and Localisation (CARACAL), with an established, high-end recorder, the Wildlife Acoustics Song Meter (SM). Methods. Four recorders of each type were deployed in a paired set-up across five nights in Wisconsin, USA. The recordings allowed for manual identification of domestic dog (Canis familiaris), grey wolf (Canis lupus), coyote (Canis latrans) and barred owl (Strix varia) calls, and then the ability of each recorder type to detect and localise the vocalising animals was compared. Key results. The CARACALs were less sensitive, detecting only 47.5% of wolf, 55% of coyote, 65% of barred owl and 82.5% of dog vocalisations detected by the paired SMs. However, when the same vocalisations were detected on both recorders, localisation was comparable, with no significant difference in the precision or maximum detection ranges. Conclusions. Low-cost recording equipment can be used effectively for acoustic localisation of both wild and domestic animals. However, the lower sensitivity of the CARACALs means that a denser network of these recorders would be needed to achieve the same efficacy as the SMs. Deploying a greater number of cheaper recorders increases the labour time in the field and the quantity of data to process and store. Thus, there is a trade-off between cost and time to be considered. Implications. The ability to use low-cost recorders for acoustic localisation provides new avenues for tracking, managing and ... |
author2 |
Bethany R. Smith Holly Root-Gutteridge Hannah Butkiewicz Angela Dassow Amy C. Fontaine Andrew Markham Jessica Owens Loretta Schindler Matthew Wijers Arik Kershenbaum |
format |
Text |
author |
Bethany R. Smith Holly Root-Gutteridge Hannah Butkiewicz Angela Dassow Amy C. Fontaine Andrew Markham Jessica Owens Loretta Schindler Matthew Wijers Arik Kershenbaum |
author_facet |
Bethany R. Smith Holly Root-Gutteridge Hannah Butkiewicz Angela Dassow Amy C. Fontaine Andrew Markham Jessica Owens Loretta Schindler Matthew Wijers Arik Kershenbaum |
author_sort |
Bethany R. Smith |
title |
Acoustic localisation of wildlife with low-cost equipment: lower sensitivity, but no loss of precision |
title_short |
Acoustic localisation of wildlife with low-cost equipment: lower sensitivity, but no loss of precision |
title_full |
Acoustic localisation of wildlife with low-cost equipment: lower sensitivity, but no loss of precision |
title_fullStr |
Acoustic localisation of wildlife with low-cost equipment: lower sensitivity, but no loss of precision |
title_full_unstemmed |
Acoustic localisation of wildlife with low-cost equipment: lower sensitivity, but no loss of precision |
title_sort |
acoustic localisation of wildlife with low-cost equipment: lower sensitivity, but no loss of precision |
publisher |
CSIRO Publishing |
publishDate |
2021 |
url |
https://doi.org/10.1071/WR21089 |
op_coverage |
world |
genre |
Canis lupus |
genre_facet |
Canis lupus |
op_source |
https://doi.org/10.1071/WR21089 |
op_relation |
doi:10.1071/WR21089 |
op_rights |
All rights reserved. |
op_doi |
https://doi.org/10.1071/WR21089 |
container_title |
Wildlife Research |
container_volume |
49 |
container_issue |
4 |
container_start_page |
372 |
op_container_end_page |
381 |
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1800749865314025472 |