National Centre for Audiology and Program in Health and Rehabilitation Sciences (Hearing Sciences), Faculty of Health Sciences, The University of Western Ontario, London, Ontario, Canada.
Int J Audiol. 2012 Dec;51(12):926-31. doi: 10.3109/14992027.2012.711913. Epub 2012 Aug 24.
Cortical auditory evoked potentials (CAEPs) can be elicited to stimuli generated from different parts of speech. The aim of this study was to compare the phoneme /ʃ/ from word medial and word initial positions and its influence on the CAEP.
Stimuli from word medial positions were found to have shorter rise times compared to the same phonemes from word initial positions. A repeated measures design was carried out with CAEPs elicited using /ʃ/ from a word initial and a word medial position.
Sixteen individuals with audiometric thresholds within normal limits participated in the study.
Stimuli /ʃ/ from a word medial position elicited CAEPs with significantly larger amplitudes and shorter latencies compared to /ʃ/ from a word initial position (p < 0.05).
Findings from this study, incorporating naturally produced speech sounds, suggest the need to consider spectral and temporal variations when choosing stimuli to optimize the amplitude and latency characteristics of the CAEP. Overall, findings illustrate good test-retest reliability of CAEP measures using speech stimuli with clinical equipment.
皮质听觉诱发电位（CAEPs）可针对来自言语不同部位的刺激进行诱发。本研究旨在比较位于词中位置和词首位置的音位 /ʃ/及其对 CAEP 的影响。
与位于词首位置的相同音位相比，位于词中位置的刺激具有更短的上升时间。采用重复测量设计，使用来自词首和词中位置的 /ʃ/诱发 CAEP。
16 名听力阈值在正常范围内的个体参与了本研究。
与来自词首位置的 /ʃ/相比，位于词中位置的刺激诱发的 CAEP 具有明显更大的振幅和更短的潜伏期（p < 0.05）。
本研究纳入了自然产生的语音，结果表明在选择刺激以优化 CAEP 的振幅和潜伏期特征时，需要考虑频谱和时间变化。总体而言，这些发现说明了使用临床设备的语音刺激进行 CAEP 测量具有良好的测试-重测可靠性。
