A standardized method of classifying pulsed sounds and its application to pulse rate measurement of blue whale southeast Pacific song units

• Published in: The Journal of the Acoustical Society of America
• Main Authors: Patris, Julie, Malige, Franck, Glotin, Hervé, Asch, Mark, Buchan, Susannah
• Other Authors: DYNamiques de l’Information (DYNI), Laboratoire d'Informatique et des Systèmes (LIS) (Marseille, Toulon) (LIS), Aix Marseille Université (AMU)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS)-Aix Marseille Université (AMU)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Amiénois de Mathématique Fondamentale et Appliquée - UMR CNRS 7352 UPJV (LAMFA), Université de Picardie Jules Verne (UPJV)-Centre National de la Recherche Scientifique (CNRS), Universidad de Concepción = University of Concepción Chile (UdeC), PNRIA, ANR-18-CE40-0014,SMILES,Modélisation et Inférence Statistique pour l'Apprentissage non-supervisé à partir de Données Massives(2018)
• Format: Article in Journal/Newspaper
• Language: English
• Published: HAL CCSD 2019
• Subjects: [INFO.INFO-TS]Computer Science [cs]/Signal and Image Processing; Blue whale
• Online Access: https://hal.science/hal-02440173; https://hal.science/hal-02440173/document; https://hal.science/hal-02440173/file/pdf_archiveJASMANvol_146iss_42145_1.pdf; https://doi.org/10.1121/1.5126710

International audience Pulsed sounds are an interesting example of complex biological sounds, frequent in cetaceans' vocalizations. A two-group classification of these sounds is proposed: tonal or non-tonal. Through two simple mathematical models, it is shown that this classification can lead to better techniques for measuring the pulse rate. This classification is thus useful for improving measurement accuracy, but can also help in formulating hypotheses regarding mechanisms of sound production. This method of classification is applied to south Pacific blue whale vocalizations and it is found that the pulse rate corresponds to the fundamental frequency (not expressed in the spectrum) of the song. Thus, the hypothesis that the sound is produced by only one organ and then filtered by the body of the giant is reinforced.