幼儿对退化信号的理解：噪声编码与正弦波模拟信号
Toddlers' comprehension of degraded signals: Noise-vocoded versus sine-wave analogs.
作者信息
Newman Rochelle S, Chatterjee Monita, Morini Giovanna, Remez Robert E
机构信息
Department of Hearing and Speech Sciences, 0100 Lefrak Hall, University of Maryland, College Park, Maryland 20742, USA
Boys Town National Research Hospital, 555 North 30th Street, Omaha, Nebraska 68131, USA
出版信息
J Acoust Soc Am. 2015 Sep;138(3):EL311-7. doi: 10.1121/1.4929731.
Abstract
Recent findings suggest that development changes the ability to comprehend degraded speech. Preschool children showed greater difficulties perceiving noise-vocoded speech (a signal that integrates amplitude over broad frequency bands) than sine-wave speech (which maintains the spectral peaks without the spectrum envelope). In contrast, 27-month-old children in the present study could recognize speech with either type of degradation and performed slightly better with eight-channel vocoded speech than with sine-wave speech. This suggests that children's identification performance depends critically on the degree of degradation and that their success in recognizing unfamiliar speech encodings is encouraging overall.
摘要
最近的研究结果表明，发育会改变理解退化语音的能力。学龄前儿童在感知噪声声码语音（一种在宽频带上整合振幅的信号）方面比正弦波语音（保持频谱峰值但没有频谱包络）表现出更大的困难。相比之下，本研究中的27个月大的儿童能够识别这两种类型退化的语音，并且在识别八通道声码语音时的表现略优于正弦波语音。这表明儿童的识别表现关键取决于退化程度，并且他们在识别不熟悉语音编码方面的成功总体上令人鼓舞。
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