Comparison of acoustic parameters of segmented vocalizations in Japanese Black calf after weaning

Abstract

This study was conducted to separate Japanese Black calf vocalizations after weaning and to compare the acoustic parameters of each segment. Vocalization was divided into two segments by directly observing the calf utterance action and performing spectrogram analysis. As a result, the first and second segments were defined in order of time. These vocalizations were classified using waveform shapes and spectrograms. The acoustic features of vocalizations were extracted using Praat acoustic analysis software. Differences in call duration, fundamental frequency, intensity, and formants (1–4) were compared among the segments. The acoustic parameters, except formant 1, differed (P < 0.001) between the first and second segments. In addition, there were significant differences (P < 0.05) in formants between male and female. Thus, Japanese Black calf vocalizations after weaning are capable of segmenting, the acoustic features of segment were revealed.

Journal of Warm Regional Society of Animal Science, Japan 67（2）: 111-117, 2024