中华耳科学杂志2016，Vol.14Issue(5)：634-638,5.DOI:10.3969/j.issn.1672-2922.2016.05.016
Speech-ABR安静及噪声环境下音位的对比研究
Speech-ABR on Phoneme in Quiet and Noise Environment
王倩 1王燕 2刘志成1
作者信息
- 1. 首都医科大学生物医学工程学院 北京100069
- 2. 中国人民解放军总医院耳鼻咽喉头颈外科 北京100853
- 折叠
摘要
Abstract
Objective The aim of the study was to compare speech-ABR results with changes of vowel, consonant and pitch of monosyllables under quiet and noise circumstances. Methods Forty Mandarin speaking subjects (20 males, 20 fe-males) with normal hearing were recruited. The stimulus of speech-ABR was/mi/with a duration of 260 ms and down-up pitch, delivered to the right ear at 70 dB SPL. The peaks of response waves were labeled. The latencies of onset response (OR), consonant-to-vowel transition (CV) and frequency following response (FFR) were analyzed under quiet and noisy (SNR=-10 dB) circumstances, and correlation coefficients of pitch tracking were compared. The SPSS 18.0 software was used for statistical analysis. Paired sample t-test was used for two group comparisons. Statistical significance was defined as P<0.05. Results Brainstem responses elicited by/mi/were composed of four parts:an onset response (10 ms), a transitional response (10-80 ms), a frequency following response (80-220 ms) and an offset response. The onset response was evoked by the consonant and the transitional response by consonant-to-vowel transition. The frequency following response, evoked by the vowel, was composed of fifteen response waves. A series of featured waves were observed. The change of average la-tency of the onset response wave was 0.85±0.17 ms (P=0.000). The change of average latency of consonant-to-vowel transi-tion wave was 0.75±0.15 ms (P=0.000), and the change of average latency of frequency following response wave was 0.38± 0.10 ms (P=0.000). Furthermore, the correlation coefficient of pitch tracking was 0.84 ± 0.08 under quiet environment and 0.74±0.12 under noisy environment (P=0.000). Conclusions Noise can change latencies of the consonant and vowel, and re-duce correlation coefficient of pitch tracking. These results suggest that the three phonemes can be affected by noise. Com-pared with the subjective evoked potentials in previous reports, speech-ABR is more sensitive and objective to detect differ-ences in auditory recognition against noise background..关键词
speech-ABR/言语噪声/单音节Key words
speech-ABR/speech noise/monosyllable分类
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王倩,王燕,刘志成..Speech-ABR安静及噪声环境下音位的对比研究[J].中华耳科学杂志,2016,14(5):634-638,5.
