Sensitivity of school-aged children to pitch-related cues
Sensitivity of school-aged children to pitch-related cues
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DOI：
10.1121/1.3692230
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发表时间：
2012-04-01
影响因子：
2.4
通讯作者：
Chatterjee, Monita
中科院分区：
文献类型：
--
作者：
Deroche, Mickael L. D.;Zion, Danielle J.;Chatterjee, Monita
两个实验研究了17名学龄儿童处理纯时间和频谱时间线索的能力，这些线索是音高变化的信号。在实验1中测量了宽带噪声的正弦幅度调制率（AMR）的辨别率，在实验2中测量了宽带正弦相位谐波复合物的基频（F0）的辨别率。参考AMR为100 Hz，参考F0也是如此。一个儿童友好的界面帮助听众保持注意力的任务。数据拟合使用最大似然技术，提取阈值，斜率和递减率。随后将所有阈值标准化为等于0.77的共同d'值。有相对较大的个体差异的听众：八个相对成人一样的阈值在这两个任务和九个有较高的阈值。然而，在6-16岁的跨度内，这些个体差异并没有随年龄而系统地变化。在这两项任务中，F0的识别能力比AMR的识别能力高出9倍，这是以前在成年人中观察到的。(C)2012年美国声学学会。[http：//dx.doi.org/10.1121/1.3692230]
Two experiments investigated the ability of 17 school-aged children to process purely temporal and spectro-temporal cues that signal changes in pitch. Percentage correct was measured for the discrimination of sinusoidal amplitude modulation rate (AMR) of broadband noise in experiment 1 and for the discrimination of fundamental frequency (F0) of broadband sine-phase harmonic complexes in experiment 2. The reference AMR was 100 Hz as was the reference F0. A child-friendly interface helped listeners to remain attentive to the task. Data were fitted using a maximum-likelihood technique that extracted threshold, slope, and lapse rate. All thresholds were subsequently standardized to a common d' value equal to 0.77. There were relatively large individual differences across listeners: eight had relatively adult-like thresholds in both tasks and nine had higher thresholds. However, these individual differences did not vary systematically with age, over the span of 6-16 yr. Thresholds were correlated across the two tasks and were about nine times finer for F0 discrimination than for AMR discrimination as has been previously observed in adults. (C) 2012 Acoustical Society of America. [http://dx.doi.org/10.1121/1.3692230]