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Audiology and Speech Research > Volume 14(2); 2018 > Article
Audiology and Speech Research 2018;14(2): 143-147. doi: http://dx.doi.org/10.21848/asr.2018.14.2.143
한국어 기반 클리어스피치와 일반 발화에 따른 어음역동범위 비교
이경주1, 오홍엽1, 신수연1, 허소희1, 진인기2
1한림대학교 일반대학원 언어병리청각학과
2한림대학교 자연과학대학 언어청각학부·청각언어연구소
Comparison of Dynamic Range of Clear Speech and Conversational Speech in Korean
Kyungju Lee1, Hongyeop Oh1, Suyeon Shin1, Sohee Heo1, In-Ki Jin2
1Department of Speech Pathology and Audiology, Graduate School, Hallym University, Chuncheon, Korea
2Division of Speech Pathology and Audiology, Research Institute of Audiology and Speech Pathology, College of Natural Sciences, Hallym University, Chuncheon, Korea
Correspondence  In-Ki Jin ,Tel: +82-33-248-2221, Fax: +82-33-256-3420, Email: inkijin@hallym.ac.kr
Received: January 10, 2018; Revised: February 12, 2018   Accepted: March 10, 2018.  Published online: April 30, 2018.
Speech dynamic range (DR) represents the range between maximum and minimum levels of speech across frequencies. The DR has been considered as an important factor in speech intelligibility. This study aimed to identify any differences in DR between Korean clear speech and conversational speech.
A standardized sentence stimuli were recorded with manners of conversational and clear speech. The DR was quantified using cumulative histogram levels based on recorded voice data from 35 native Korean female participants with normal hearing. Then, the DRs were compared according to the production method after level normalization at 65 dB sound pressure level.
Maximum levels in the DR for Korean clear speech were greater than for Korean conversational speech in most frequency bands. Especially, differences of the DR between conversational speech and clear speech were between 0.47 dB (center frequency of 570 Hz) and 2.96 dB (center frequency of 1,170 Hz).
The results of this study suggest that the DR for Korean clear speech has acoustical characteristics that are favorable to speech intelligibility, compared to the DR for conversational speech.
Key Words: Clear speech, Speech intelligibility, Dynamic range of speech
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