Volen National Center for Complex Systems, Brandeis University, Waltham, Massachusetts 02454, USA.
Department of Biomedical Engineering, Hearing Research Center, Boston University, Boston, Massachusetts 02215, USA.
J Acoust Soc Am. 2018 Oct;144(4):2088. doi: 10.1121/1.5054905.
The rhythms of speech and the time scales of linguistic units (e.g., syllables) correspond remarkably to cortical oscillations. Previous research has demonstrated that in young adults, the intelligibility of time-compressed speech can be rescued by "repackaging" the speech signal through the regular insertion of silent gaps to restore correspondence to the theta oscillator. This experiment tested whether this same phenomenon can be demonstrated in older adults, who show age-related changes in cortical oscillations. The results demonstrated a similar phenomenon for older adults, but that the "rescue point" of repackaging is shifted, consistent with a slowing of theta oscillations.
言语的节律和语言单位（如音节）的时间尺度与皮层振荡惊人地对应。以前的研究表明，在年轻成年人中，通过有规律地插入无声间隙来“重新打包”语音信号，可以恢复时间压缩语音的可理解性，从而恢复与theta 振荡器的对应关系。本实验测试了这一现象是否也能在表现出皮层振荡随年龄变化的老年人中得到证明。结果表明，老年人中也存在类似现象，但重新打包的“拯救点”发生了转移，与 theta 振荡的减慢一致。
