주파수 대역 제한에 의한 한국어 자음의 지각 특성 분석

Abstract

This paper investigated the effects of frequency band limitation on perceptual characteristics of Korean consonants. Monosyllabic speech (144 syllables of CV type, 56 syllables of VC type, 8 syllables of V type) produced by two announcerswere low- and high-pass filtered with cutoff frequencies ranging from 300 to 5000 Hz. Six listeners with normal hearingperformed perception test by types of filter and cutoff frequencies. We reported phoneme recognition rates and types ofperception error of band-limited Korean consonants to examine how frequency distortion in the process of speech transmissionaffect listener’s perception. The results showed that recognition rates varied with the following factors: position in a syllable,manner of articulation, place of articulation, and phonation types. Consonants in the final position were stronger to thefrequency band limitation than those in the initial position. Fricatives and Affricates are stronger than stops. Fortis consonantswere less stronger than their lenis or aspirated counterparts. Types of perception error also varied depending on such factorsas consonant’s place of articulation: In case of bilabial stops, they were perceived as alveolar stops with while in cases ofalveolar and velar stops, there were changes in phonation types without any change in the place of articulation.