A CRITICAL-BAND-FILTER ANALYSIS OF JAPANESE SPEECH SENTENCES
This investigation aims to seek common factors of speech sounds across different languages, which may be exploited widely in speech perception. Two-hundred sentences of Japanese, each uttered by 10 native speakers (5 females and 5 males), were analyzed through 20 bands of critical-band filters. Smoothed power fluctuations derived from the filters were submitted to factor analysis. The first three factors explained 33.6-34.8% of variance. These three factors, which could be related to four frequency bands, had appeared in the same way as in our previous analysis of British English speech. Intelligible noise-vocoded speech was obtained for both languages utilizing these frequency bands. The present analysis showed a common aspect of speech communication between Japanese and British English.