Effects of manipulating the amplitude of consonant noise portion on subcortical representation of voice onset time and voicing perception in stop consonants
Effects of manipulating the amplitude of consonant noise portion on subcortical representation of voice onset time and voicing perception in stop consonants
复制标题
控制辅音噪声部分的幅度对皮层下发声时间表示和停辅音发声感知的影响
DOI：
10.1044/2018_jslhr-h-18-0102
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发表时间：
2019
期刊：
影响因子：
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通讯作者：
S.
中科院分区：
文献类型：
--
作者：
Tamura;S.;Ito;K.;Hirose;N.;& Mori;S.
目的本研究的目的是调查语音感知是否会反映皮层下语音表征的微小潜伏期变化。方法12名日本本土听众参与了实验。这些听众参与了语音识别任务和听觉脑干反应 (ABR) 测量，使用 /d/–/t/ 连续刺激改变发声时间 (VOT)，并操纵初始噪声（辅音）部分的幅度，其持续时间对应于 VOT。结果增加噪声部分幅度延长了 VOT 的皮层下表示，这是与声音同步的 ABR 之间的延迟差。 初始噪声的开始和随后的周期性（元音）部分（VOTABR）并使听众可能将具有模糊 VOT 的刺激感知为清音停止/t/。此外，VOTABR延长量与VOT边界缩短量接近。结论皮层下语音表征中几毫秒的差异对于感知具有模糊声学线索的语音很重要。补充材料https://doi.org/10.23641/asha.7728695
PurposeThe purpose of this study was to investigate whether speech perception would reflect small latency changes in subcortical speech representation.MethodTwelve native Japanese listeners participated in the experiment. Those listeners participated in speech identification task and auditory brainstem response (ABR) measurement using /d/–/t/ continuum stimuli varying in voice onset time (VOT) with manipulation of the amplitude of initial noise (consonant) portion, the duration of which corresponded to VOT.ResultsIncreasing the noise portion amplitude lengthened subcortical representation of VOT, which is the latency difference between ABRs synchronizing to the onsets of initial noise and following periodic (vowel) portions (VOTABR) and made listeners likely to perceive the stimuli with ambiguous VOT as a voiceless stop /t/. In addition, the amount of VOTABRlengthening was close to that of the VOT boundary shortening.ConclusionA few milliseconds of difference in subcortical speech representation are important for the perception of speech sounds with ambiguous acoustic cues.Supplemental Materialhttps://doi.org/10.23641/asha.7728695