Acoustic analysis of Japanese Black calf vocalizations after weaning

Abstract

This study was conducted to analyze the vocalizations of Japanese Black calves after weaning. Twenty-four Japanese Black calves (14 males and 10 females) at 4-6 months were used in this experiment. The vocalizations of calves were recorded after weaning. These vocalizations were classified using waveform shapes and spectrograms. Acoustic features of vocalizations were extracted using Praat acoustic analysis software. The call duration, fundamental frequency, intensity, and formants differed significantly (P < 0.001) among individual calves. However, call duration and fundamental frequency were different (P < 0.05) between male and female calves. These results suggest that vocalization analysis could be a useful tool to investigate individual and sex differences of Japanese Black calves.

Journal of Warm Regional Society of Animal Science, Japan 67（2）: 65-71, 2024