儿童听觉滤波器的宽度。

The width of the auditory filter in children.

作者信息

Irwin R J, Stillman J A, Schade A

出版信息

J Exp Child Psychol. 1986 Jun;41(3):429-42. doi: 10.1016/0022-0965(86)90003-2.

Abstract

Because young children have poorer auditory temporal resolution than older children, they ought to have, according to the inverse relation between temporal and frequency resolution, narrower auditory filters than older children. Therefore, the auditory filters of two 6-year-olds, two 10-year-olds, and two adults were measured by having them detect a 400-ms sinusoid (500, 1000, or 3000 Hz) centered in a spectral notch in a band of noise. The signal power for 71% correct was determined as a function of notch width with the two-alternative, forced-choice procedure. The principal results showed a significant decrease in signal power with age and a significant interaction between age and notch width. The best-fitting parameters of a model of the auditory filter showed that the filter was significantly wider for the 6-year-olds than for the 10-year-olds or the adults.

摘要

由于幼儿的听觉时间分辨率比大龄儿童差，根据时间分辨率与频率分辨率之间的反比关系，他们的听觉滤波器应比大龄儿童更窄。因此，通过让两名6岁儿童、两名10岁儿童和两名成年人检测位于噪声带频谱陷波中心的400毫秒正弦波（500、1000或3000赫兹），测量了他们的听觉滤波器。采用二选一的强制选择程序，将71%正确时的信号功率确定为陷波宽度的函数。主要结果显示，信号功率随年龄显著降低，且年龄与陷波宽度之间存在显著交互作用。听觉滤波器模型的最佳拟合参数表明，6岁儿童的滤波器比10岁儿童或成年人的滤波器显著更宽。