Using a novel visualization tool for rapid survey of long-duration acoustic recordings for ecological studies of frog chorusing

Brodie, Sheryn, Towsey, Michael, Allen-Ankins, Slade, Roe, Paul, and Schwarzkopf, Lin (2022) Using a novel visualization tool for rapid survey of long-duration acoustic recordings for ecological studies of frog chorusing. Frontiers in Ecology and Evolution, 9. 761147.

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Abstract

Continuous recording of environmental sounds could allow long-term monitoring of vocal wildlife, and scaling of ecological studies to large temporal and spatial scales. However, such opportunities are currently limited by constraints in the analysis of large acoustic data sets. Computational methods and automation of call detection require specialist expertise and are time consuming to develop, therefore most biological researchers continue to use manual listening and inspection of spectrograms to analyze their sound recordings. False-color spectrograms were recently developed as a tool to allow visualization of long-duration sound recordings, intending to aid ecologists in navigating their audio data and detecting species of interest. This paper explores the efficacy of using this visualization method to identify multiple frog species in a large set of continuous sound recordings and gather data on the chorusing activity of the frog community. We found that, after a phase of training of the observer, frog choruses could be visually identified to species with high accuracy. We present a method to analyze such data, including a simple R routine to interactively select short segments on the false-color spectrogram for rapid manual checking of visually identified sounds. We propose these methods could fruitfully be applied to large acoustic data sets to analyze calling patterns in other chorusing species.

Item ID: 72603
Item Type: Article (Research - C1)
ISSN: 2296-701X
Keywords: acoustic monitoring, Ecoacoustics, frog chorusing, acoustic data analysis, acoustic data visualisation, chorus detection
Copyright Information: Copyright © 2022 Brodie, Towsey, Allen-Ankins, Roe and Schwarzkopf. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
Funders: Australian Research Council (ARC)
Projects and Grants: ARC LP150100675
Date Deposited: 23 Feb 2022 09:19
FoR Codes: 41 ENVIRONMENTAL SCIENCES > 4104 Environmental management > 410401 Conservation and biodiversity @ 100%
SEO Codes: 18 ENVIRONMENTAL MANAGEMENT > 1806 Terrestrial systems and management > 180606 Terrestrial biodiversity @ 100%
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