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Acoustic localization of crows in pre-roost aggregations.
J Acoust Soc Am. 2019 12; 146(6):4664.JA

Abstract

Crows are highly intelligent and social creatures. Each night during the non-breeding period, they gather on large pre-roost aggregations as they move towards their communal roost where they sleep. Crows make numerous and varied vocalizations on these pre-roost aggregations, but the purpose of these calls, and vocal communication in general, in these pre-roost aggregations is not fully understood. In this paper, an array of four microphones is used as a non-intrusive means to observe crow vocal behavior in pre-roost aggregations in the absence of human observers. By passively localizing animal vocalizations, the location of individuals can be monitored while simultaneously recording the acoustic structure and organization of their calls. Simulations and experiment are undertaken to study the performance of two time difference of arrival-based methods (hyperbolic location estimator and maximum likelihood estimator) for call localization. The effect of signal-to-noise ratio and uncertainty in measurement on the localization error is presented. By describing, modeling, and testing these techniques in this innovative context, the authors hope that researchers will employ the authors' approaches in future empirical studies to more fully understand crow vocal behavior.

Authors+Show Affiliations

Division of Engineering and Mathematics, School of STEM, University of Washington, 18115 Campus Way North East, Box 358538, Bothell, Washington 98011, USA.Division of Biological Sciences, School of STEM, University of Washington, 18115 Campus Way North East, Box 358538, Bothell, Washington 98011, USA.Division of Biological Sciences, School of STEM, University of Washington, 18115 Campus Way North East, Box 358538, Bothell, Washington 98011, USA.Division of Engineering and Mathematics, School of STEM, University of Washington, 18115 Campus Way North East, Box 358538, Bothell, Washington 98011, USA.

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

31893686

Citation

Abadi, Shima H., et al. "Acoustic Localization of Crows in Pre-roost Aggregations." The Journal of the Acoustical Society of America, vol. 146, no. 6, 2019, p. 4664.
Abadi SH, Wacker DW, Newton JG, et al. Acoustic localization of crows in pre-roost aggregations. J Acoust Soc Am. 2019;146(6):4664.
Abadi, S. H., Wacker, D. W., Newton, J. G., & Flett, D. (2019). Acoustic localization of crows in pre-roost aggregations. The Journal of the Acoustical Society of America, 146(6), 4664. https://doi.org/10.1121/1.5138133
Abadi SH, et al. Acoustic Localization of Crows in Pre-roost Aggregations. J Acoust Soc Am. 2019;146(6):4664. PubMed PMID: 31893686.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Acoustic localization of crows in pre-roost aggregations. AU - Abadi,Shima H, AU - Wacker,Douglas W, AU - Newton,Jeremy G, AU - Flett,Derek, PY - 2020/1/3/entrez PY - 2020/1/3/pubmed PY - 2020/1/3/medline SP - 4664 EP - 4664 JF - The Journal of the Acoustical Society of America JO - J. Acoust. Soc. Am. VL - 146 IS - 6 N2 - Crows are highly intelligent and social creatures. Each night during the non-breeding period, they gather on large pre-roost aggregations as they move towards their communal roost where they sleep. Crows make numerous and varied vocalizations on these pre-roost aggregations, but the purpose of these calls, and vocal communication in general, in these pre-roost aggregations is not fully understood. In this paper, an array of four microphones is used as a non-intrusive means to observe crow vocal behavior in pre-roost aggregations in the absence of human observers. By passively localizing animal vocalizations, the location of individuals can be monitored while simultaneously recording the acoustic structure and organization of their calls. Simulations and experiment are undertaken to study the performance of two time difference of arrival-based methods (hyperbolic location estimator and maximum likelihood estimator) for call localization. The effect of signal-to-noise ratio and uncertainty in measurement on the localization error is presented. By describing, modeling, and testing these techniques in this innovative context, the authors hope that researchers will employ the authors' approaches in future empirical studies to more fully understand crow vocal behavior. SN - 1520-8524 UR - https://www.unboundmedicine.com/medline/citation/31893686/Acoustic_localization_of_crows_in_pre-roost_aggregations L2 - https://dx.doi.org/10.1121/1.5138133 DB - PRIME DP - Unbound Medicine ER -
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