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KMID : 0359320030430010165
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Korean Journal of Veterinary Research
2003 Volume.43 No. 1 p.165 ~ p.169
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Sound parameters for classifying individual sows(Landrace×Yorkshire) during nursing behavior
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Abstract
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The aim of the present study was to analyses grunts of the sows and to extract parameters from the time and frequency signals in nursing behavior. Five crossbred Landrace×Yorkshire sows were used on day 5 or 6 postpartum. The grunts and the behaviors of the five sows were recorded with five digital camcorders. Three parameter groups [Group I : Formant vector alone, Group II : Formant vector+parameters from time signal, Group III : Formant vector+parameters form time signal-parameters elilminated by stepwise discriminant analysis backward (SDAB)] with parameter vectors extracted from single grunts in the maximum grunting rate period were used for individuality of the sows. The parameter groups were compared by a discriminant function analysis. The classification system adopted in the Group II represented the higher discrimination rate than those in other groups (Group I : 63.3%, Group II : 83.0%, Group III : 80.0%). This study demonstrated that formant, intensity, and pitch were available sound parameters for individuality of the sows during nursing behavior.
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