Yoo Jeeun, Oh Hongyeop, Jeong Seungyeop, Jin In-Ki
Department of Speech Pathology and Audiology, Graduate School, Hallym University, Chuncheon, Korea.
Division of Speech Pathology and Audiology, Research Institute of Audiology and Speech Pathology, College of Natural Sciences, Hallym University, Chuncheon, Korea.
J Audiol Otol. 2019 Oct;23(4):187-192. doi: 10.7874/jao.2019.00115. Epub 2019 Jul 20.
Clear speech is an effective communication strategy used in difficult listening situations that draws on techniques such as accurate articulation, a slow speech rate, and the inclusion of pauses. Although too slow speech and improperly amplified spectral information can deteriorate overall speech intelligibility, certain amplitude of increments of the mid-frequency bands (1 to 3 dB) and around 50% slower speech rates of clear speech, when compared to those in conversational speech, were reported as factors that can improve speech intelligibility positively. The purpose of this study was to identify whether amplitude increments of mid-frequency areas and slower speech rates were evident in Korean clear speech as they were in English clear speech.
To compare the acoustic characteristics of the two methods of speech production, the voices of 60 participants were recorded during conversational speech and then again during clear speech using a standardized sentence material.
The speech rate and longterm average speech spectrum (LTASS) were analyzed and compared. Speech rates for clear speech were slower than those for conversational speech. Increased amplitudes in the mid-frequency bands were evident for the LTASS of clear speech.
The observed differences in the acoustic characteristics between the two types of speech production suggest that Korean clear speech can be an effective communication strategy to improve speech intelligibility.
清晰言语是一种在听力困难情况下使用的有效沟通策略，它运用准确发音、缓慢语速以及停顿等技巧。尽管语速过慢和频谱信息放大不当会降低整体言语可懂度，但据报道，与对话言语相比，清晰言语中频段（1至3分贝）一定幅度的增量以及约50%的语速减缓是能够积极提高言语可懂度的因素。本研究的目的是确定韩语清晰言语中是否如英语清晰言语那样，存在中频区域的幅度增量和较慢语速。
为比较两种言语表达方式的声学特征，使用标准化句子材料，在60名参与者进行对话言语时以及之后进行清晰言语时记录他们的声音。
对语速和长期平均言语频谱（LTASS）进行了分析和比较。清晰言语的语速比对话言语的语速慢。清晰言语的LTASS在中频带的幅度明显增加。
两种言语表达方式在声学特征上观察到的差异表明，韩语清晰言语可能是一种提高言语可懂度的有效沟通策略。
