Envelope and spectral frequency-following responses to vowel sounds
Envelope and spectral frequency-following responses to vowel sounds
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DOI：
10.1016/j.heares.2008.08.004
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发表时间：
2008-11-01
期刊：
影响因子：
2.8
通讯作者：
Picton, Terence W.
中科院分区：
文献类型：
--
作者：
Aiken, Steven J.;Picton, Terence W.
记录正常听力受试者自然产生的两个元音（/a/和/i/）的频率跟随反应（FFRs）。数字式傅立叶分析仪用于测量基频和23个更高谐波的响应幅度。通过添加或减去对相反极性刺激的反应，将与刺激包络相关的反应成分（“包络FFR”）与与刺激谱相关的反应成分（“谱FFR”）区分开来。所有受试者在两个元音的基频处都检测到显著的包络ffr。在接近形成峰峰的谐波和耳蜗互调失真产物对应的谐波处检测到显著的频谱ffr，但这些在所有受试者中都不显著，在1500 Hz以上未检测到。这些发现表明，语音诱发的ffr既遵循声门音高包络，也遵循频谱刺激成分。(C) 2008 Elsevier B.V.版权所有
Frequency-following responses (FFRs) were recorded to two naturally produced vowels (/a/ and /i/) in normal hearing Subjects. A digitally implemented Fourier analyzer was used to measure response amplitude at the fundamental frequency and at 23 higher harmonics. Response components related to the stimulus envelope ("envelope FFR") were distinguished from components related to the stimulus spectrum ("spectral FFR") by adding or subtracting responses to opposite polarity stimuli. Significant envelope FFRs were detected at the fundamental frequency of both vowels, for all of the subjects. Significant spectral FFRs were detected at harmonics close to formant peaks, and at harmonics corresponding to cochlear intermodulation distortion products, but these were not significant in all subjects, and were not detected above 1500 Hz. These findings indicate that speech-evoked FFRs follow both the glottal pitch envelope as well as spectral Stimulus components. (C) 2008 Elsevier B.V. All rights reserved.