GLOTTAL CLOSURE REGION DETECTING APPARATUS AND METHOD

摘要

PROBLEM TO BE SOLVED: To provide a glottis closing zone detecting apparatus detecting a glottal closure region in a natural phonation state with a simple constitution. SOLUTION: A changeover device 202 directly receives an analog voice signal from a microphone 132 and receives a signal after the voice signal from the microphone 132 passes through a passing band variable BPF (Band-Pass Filter) 200. The output of the changeover device 202 is converted into a digital signal by an A/D converter 204 and then stored in a buffer memory section 206. CPU 120 detects a forth formant frequency region based on the frequency spectrum from a frequency analysis part 208 and controls the passing band of the BPF 200 to pass through the fourth formant frequency region based on the detection. COPYRIGHT: (C)2007,JPO&INPIT