롬바드 효과에 따른 말소리의 지각적 및 음향학적 특성

다국어 초록 (Multilingual Abstract)

Purpose: Lombard speech has been reported to be more intelligible in noisy environments than in quite conditions. The current study aimed to examine the the acoustic aspects of Lombard speech by young adults. Methods: Ten healthy adults (five males, five females) in their 20s, without communication disorders or hearing problems, took part in the study. Connected speech samples from reading and conversation tasks were collected for acoustic analysis. Speech was produced in both quiet and noisy conditions. Noisy conditions included white noise and cocktail party noise at both 55dB and 70dB. Acoustic analysis was done by Praat 2.0, and mean dB, mean F0, F1 and F2 for vowel '/a/, /i/, /u/' were measured. Results: A five-point questionnaire on the perceptual change of Lombard speech was administered to the speakers. An analysis of variance (ANOVA) with two within-subjects factors (noise conditions, speech tasks, noise dB) showed no significant overall effects of subset in only noisy dB conditions. F1 values were increased in all speakers as noise dB increased, but F2 values were inconsistent. There was a significant difference in perceptual judgement in all noisy conditions. Conclusions: The correlation between the preception and acoustics of Lombard speech will be studied further from a clinical standpoint.

참고문헌 (Reference)

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