Separating overlapping click trains originating from multiple individuals in echolocation recordings.
(2011) In Journal of the Acoustical Society of America 129(1). p.458-466- Abstract
- Recordings of the acoustic activity of free-swimming groups of echolocating dolphins increase the likelihood of collecting overlapping click trains, originating from multiple individuals, in the same set of data. In order to evaluate the click properties of each individual based on such recordings it is necessary to identify which clicks originate from which animal. This paper suggests a computationally efficient strategy to separate overlapping click trains originating from multiple free-swimming bottlenose dolphins, enabling echolocation analysis at an individual level on several animals. This technique is based on sequential matching of the frequency spectra of successive clicks. The clicks are grouped together as individual click... (More)
- Recordings of the acoustic activity of free-swimming groups of echolocating dolphins increase the likelihood of collecting overlapping click trains, originating from multiple individuals, in the same set of data. In order to evaluate the click properties of each individual based on such recordings it is necessary to identify which clicks originate from which animal. This paper suggests a computationally efficient strategy to separate overlapping click trains originating from multiple free-swimming bottlenose dolphins, enabling echolocation analysis at an individual level on several animals. This technique is based on sequential matching of the frequency spectra of successive clicks. The clicks are grouped together as individual click trains if the correlation coefficients between clicks are higher than a pre-set threshold level. The robustness of the algorithm is tested by adding artificially generated white Gaussian noise and comparing the results with other comparable commonly used methods based on inter-click intervals, centroid frequencies, and amplitude levels. The described method is applicable to a variety of experimental and observational contexts, e.g., those regarding echolocation development of calves, the hypothesized acoustic "etiquette" among dolphins when investigating the same object, and the possible occurrence of eavesdropping in large dolphin pods. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/1832149
- author
- Starkhammar, Josefin LU ; Nilsson, Johan LU ; Amundin, Mats ; Kuczaj, Stan A ; Almqvist, Monica LU and Persson, Hans W LU
- organization
- publishing date
- 2011
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Journal of the Acoustical Society of America
- volume
- 129
- issue
- 1
- pages
- 458 - 466
- publisher
- American Institute of Physics (AIP)
- external identifiers
-
- wos:000286944600051
- pmid:21303025
- scopus:79551655976
- pmid:21303025
- ISSN
- 1520-8524
- DOI
- 10.1121/1.3519404
- language
- English
- LU publication?
- yes
- id
- cc510c13-92dd-48d4-b1d3-cf85b8f411e2 (old id 1832149)
- date added to LUP
- 2016-04-01 14:01:42
- date last changed
- 2022-01-27 22:28:00
@article{cc510c13-92dd-48d4-b1d3-cf85b8f411e2,
abstract = {{Recordings of the acoustic activity of free-swimming groups of echolocating dolphins increase the likelihood of collecting overlapping click trains, originating from multiple individuals, in the same set of data. In order to evaluate the click properties of each individual based on such recordings it is necessary to identify which clicks originate from which animal. This paper suggests a computationally efficient strategy to separate overlapping click trains originating from multiple free-swimming bottlenose dolphins, enabling echolocation analysis at an individual level on several animals. This technique is based on sequential matching of the frequency spectra of successive clicks. The clicks are grouped together as individual click trains if the correlation coefficients between clicks are higher than a pre-set threshold level. The robustness of the algorithm is tested by adding artificially generated white Gaussian noise and comparing the results with other comparable commonly used methods based on inter-click intervals, centroid frequencies, and amplitude levels. The described method is applicable to a variety of experimental and observational contexts, e.g., those regarding echolocation development of calves, the hypothesized acoustic "etiquette" among dolphins when investigating the same object, and the possible occurrence of eavesdropping in large dolphin pods.}},
author = {{Starkhammar, Josefin and Nilsson, Johan and Amundin, Mats and Kuczaj, Stan A and Almqvist, Monica and Persson, Hans W}},
issn = {{1520-8524}},
language = {{eng}},
number = {{1}},
pages = {{458--466}},
publisher = {{American Institute of Physics (AIP)}},
series = {{Journal of the Acoustical Society of America}},
title = {{Separating overlapping click trains originating from multiple individuals in echolocation recordings.}},
url = {{http://dx.doi.org/10.1121/1.3519404}},
doi = {{10.1121/1.3519404}},
volume = {{129}},
year = {{2011}},
}