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광대역과 협대역 전화어음에 따른 단어 및 문장인지도와 음질인지

Word and Sentence Recognition Scores and Sound Qualities of Normal and Hearing-Impaired Listeners in Wide and Narrow Band Telephone Speech

이경원|전혜정|정인혜
한국청각언어재활학회 (Korean Academy of Audiology)|2014.04|Audiology and Speech Research|제10권 제1호|pp. 43-52

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키워드

광대역협대역Sound qualityWord recognition score문장인지도음질Sentence recognition score단어인지도전화어음Telephone speechWide-bandNarrow-band

초록

Authors tried to comparatively analyze between word recognition scores (WRSs), sentence recognition scores (SRSs) and sound quality evaluations according to wide-band telephone speech (WTS) and narrow-band telephone speech (NTS), with normal hearing (NH) and hearing impaired (HI) in quiet and noisy situations, using commercialized telephones on the market. The analysis was to determine that WTS, telephone speech of extended frequency bandwidth ranged in 100 ~ 7,000 Hz, contribute to WRS, SRS and sound qualities, compared to NTS. The results of this study were 1) in both the NH and HI groups, WRSs of WTS were higher than those of NTS. 2) Only in the HI group, SRSs were different between WTS and NTS. In a noisy situation rather than a quiet situation, SRSs of WTS were higher than those of NTS. 3) In both the NH and HI groups, the sound qualities of WTS were better than those of NTS. In this study, WRSs in both the NH and HI groups, and SRSs only in the HI group were found to be affected by the type of the frequency band of telephone speech. With industrial development and aging population, the HI population is rising, and communication over telephones in diverse environments is increasing. In this context, in order to promote feasible and effective communication of HI as well as NH, extension of telephone speech frequency bandwidth should be essential.

Abstract

Authors tried to comparatively analyze between word recognition scores (WRSs), sentence recognition scores (SRSs) and sound quality evaluations according to wide-band telephone speech (WTS) and narrow-band telephone speech (NTS), with normal hearing (NH) and hearing impaired (HI) in quiet and noisy situations, using commercialized telephones on the market. The analysis was to determine that WTS, telephone speech of extended frequency bandwidth ranged in 100 ~ 7,000 Hz, contribute to WRS, SRS and sound qualities, compared to NTS. The results of this study were 1) in both the NH and HI groups, WRSs of WTS were higher than those of NTS. 2) Only in the HI group, SRSs were different between WTS and NTS. In a noisy situation rather than a quiet situation, SRSs of WTS were higher than those of NTS. 3) In both the NH and HI groups, the sound qualities of WTS were better than those of NTS. In this study, WRSs in both the NH and HI groups, and SRSs only in the HI group were found to be affected by the type of the frequency band of telephone speech. With industrial development and aging population, the HI population is rising, and communication over telephones in diverse environments is increasing. In this context, in order to promote feasible and effective communication of HI as well as NH, extension of telephone speech frequency bandwidth should be essential.

참고문헌 (27)

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