Comparison of Speech Rate and Long-Term Average Speech Spectrum between Korean Clear Speech and Conversational Speech
Open Access
- 10 October 2019
- journal article
- research article
- Published by The Korean Audiological Society in Journal of Audiology & Otology
- Vol. 23 (4), 187-192
- https://doi.org/10.7874/jao.2019.00115
Abstract
Background and Objectives: 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. Subjects and Methods: 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. Results: The speech rate and long-term average speech spectrum (LTASS) were analyzed and compared. Speech rates for dear speech were slower than those for conversational speech. Increased amplitudes in the mid-frequency bands were evident for the LTASS of clear speech. Conclusions: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.Keywords
Funding Information
- National Research Foundation of Korea (2015R1C1A1A01052458)
- Ministry of Science, ICT and Future Planning
This publication has 16 references indexed in Scilit:
- Derivations of the band-importance function: A cross-procedure comparisonThe Journal of the Acoustical Society of America, 2015
- Intelligibility of Clear Speech: Effect of InstructionJournal of Speech, Language, and Hearing Research, 2013
- How Does Speaking Clearly Influence Acoustic Measures? A Speech Clarity Study Using Long-term Average Speech Spectra in Korean LanguageClinical and Experimental Otorhinolaryngology, 2012
- Evaluating the role of spectral and envelope characteristics in the intelligibility advantage of clear speechThe Journal of the Acoustical Society of America, 2009
- Speaking Clearly for Children With Learning DisabilitiesJournal of Speech, Language, and Hearing Research, 2003
- Speaking Clearly for the Hard of Hearing IV: Further Studies of the Role of Speaking RateJournal of Speech, Language, and Hearing Research, 1996
- Analysis, synthesis, and perception of voice quality variations among female and male talkersThe Journal of the Acoustical Society of America, 1990
- Speaking Clearly for the Hard of Hearing IIJournal of Speech, Language, and Hearing Research, 1986
- Speaking Clearly for the Hard of Hearing IJournal of Speech, Language, and Hearing Research, 1985
- Development of a test of speech intelligibility in noise using sentence materials with controlled word predictabilityThe Journal of the Acoustical Society of America, 1977