Temporally-aware algorithms for the classification of anuran sounds

PeerJ

article

Amalia Luque¹  Javier Romero-Lemos¹  Alejandro Carrasco²  Luis Gonzalez-Abril³ 

[1] Departamento de Ingeniería del Diseño, Universidad de Sevilla;Departamento de Tecnología Electrónica, Universidad de Sevilla;Departamento de Economía Aplicada I, Universidad de Sevilla

关键词: Global warming;    Sound classification;    Data mining;    Feature extraction;    Machine learning;    Habitat monitoring;   

DOI  :  10.7717/peerj.4732

学科分类：社会科学、人文和艺术（综合）

来源: Inra

【 摘 要 】

Several authors have shown that the sounds of anurans can be used as an indicator of climate change. Hence, the recording, storage and further processing of a huge number of anuran sounds, distributed over time and space, are required in order to obtain this indicator. Furthermore, it is desirable to have algorithms and tools for the automatic classification of the different classes of sounds. In this paper, six classification methods are proposed, all based on the data-mining domain, which strive to take advantage of the temporal character of the sounds. The definition and comparison of these classification methods is undertaken using several approaches. The main conclusions of this paper are that: (i) the sliding window method attained the best results in the experiments presented, and even outperformed the hidden Markov models usually employed in similar applications; (ii) noteworthy overall classification performance has been obtained, which is an especially striking result considering that the sounds analysed were affected by a highly noisy background; (iii) the instance selection for the determination of the sounds in the training dataset offers better results than cross-validation techniques; and (iv) the temporally-aware classifiers have revealed that they can obtain better performance than their non-temporally-aware counterparts.

【 授权许可】

CC BY