Livestock vocalisation classification in farm soundscapes

James C. Bishop, Greg Falzon, Mark Trotter, Paul Kwan, Paul D. Meek

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Livestock vocalisations have been shown to contain information related to animal welfare and behaviour. Automated sound detection has the potential to facilitate a continuous acoustic monitoring system, for use in a range Precision Livestock Farming (PLF) applications. There are few examples of automated livestock vocalisation classification algorithms, and we have found none capable of being easily adapted and applied to different species’ vocalisations. In this work, a multi-purpose livestock vocalisation classification algorithm is presented, utilising audio-specific feature extraction techniques, and machine learning models. To test the multi-purpose nature of the algorithm, three separate data sets were created targeting livestock-related vocalisations, namely sheep, cattle, and Maremma sheepdogs. Audio data was extracted from continuous recordings conducted on-site at three different operational farming enterprises, reflecting the conditions of real deployment. A comparison of Mel-Frequency Cepstral Coefficients (MFCCs) and Discrete Wavelet Transform-based (DWT) features was conducted. Classification was determined using a Support Vector Machine (SVM) model. High accuracy was achieved for all data sets (sheep: 99.29%, cattle: 95.78%, dogs: 99.67%). Classification performance alone was insufficient to determine the most suitable feature extraction method for each data set. Computational timing results revealed the DWT-based features to be markedly faster to produce (14.81 – 15.38% decrease in execution time). The results indicate the development of a highly accurate livestock vocalisation classification algorithm, which forms the foundation for an automated livestock vocalisation detection system.

Original languageEnglish
Pages (from-to)531-542
Number of pages12
JournalCOMPUTERS AND ELECTRONICS IN AGRICULTURE
Volume162
DOIs
Publication statusPublished - Jul 2019
Externally publishedYes

Bibliographical note

This article is available under the Creative Commons CC-BY-NC-ND license and permits non-commercial use of the work as published, without adaptation or alteration provided the work is fully attributed.

Keywords

  • Animal welfare
  • Machine learning
  • Mel-frequency Cepstral coefficients
  • Precision livestock farming
  • Support vector machines
  • Vocalisation detection
  • Wavelets

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