COUGH SOUND DETECTOR, COUGH SOUND DETECTING METHOD, COUGH SOUND DETECTING PROGRAM AND INFORMATION STORAGE MEDIUM

摘要

PROBLEM TO BE SOLVED: To detect a cough sound from breathing sound with good accuracy and automatically record the number of times of coughs. SOLUTION: This cough sound detector is provided with a sound pressure curve creating means for creating a sound pressure curve from voice signals continuous in time series, a cough sound candidate extract means for extracting an area where sound pressure above a designated value continues for more than designated time from the sound pressure curve to be taken as a cough sound candidate, and a cough sound detecting means for determining whether the cough sound candidate is a cough sound or not for every cough sound candidate. The cough sound detecting means is provided with an event measuring means for measuring a rising gradient and kurtosis, and if necessary, the maximum sound pressure of the cough sound candidate, and an event determining means for determining whether the cough sound candidate is a cough sound or not according to the rising gradient and kurtosis thereof.