Time Series Analysis on Calling Sound Data of Japanese Tree Frogs

Abstract

   We analysed time series data of sound which were observed during interactive calling behavior of two male Japanese tree frogs (Hyla japonica; Nihon-Ama-Gaeru) by the free and cross-platform sound editor Audacity. We extracted the calling data corresponding to each frog from the single time series data of calls of two frogs, and quantitatively examined inter-call intervals of respective frogs as well as their temporal relation. The results showed that a pair of male frogs called alternately in almost anti-phase synchronization with the phase difference 1.11π. [This abstract is not included in the PDF]