Age effects on discrimination of timing in auditory sequences
Age effects on discrimination of timing in auditory sequences
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DOI：
10.1121/1.1765192
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发表时间：
2004-08-01
影响因子：
2.4
通讯作者：
Gordon-Salant, S
中科院分区：
文献类型：
--
作者：
Fitzgibbons, PJ;Gordon-Salant, S
这些实验检查了与年龄相关的音调序列成分的发作间隔（IOI）增量的时间敏感性变化。使用由五个由静音间隔分隔的 50 毫秒音调组成的参考序列来检查歧视；音调频率要么固定在 4 kHz，要么在 2-4 kHz 范围内变化，以产生频谱复杂的模式。参考序列中的音调 IOI 要么相等（200 或 600 ms），要么单独变化，平均值为 200 或 600 ms，以产生时间复杂的模式。测量了 IOI 增量的差异阈值 (DL)。比较序列的特点是所有音调 IOI 均等增量或单个目标 IOI 增量，目标的顺序位置在试验中随机变化。四组患有或不患有感音神经性听力损失的年轻人和老年人参加了研究。结果表明，序列速率均匀变化的 DL 小于单个目标间隔的 DL，其中嵌入时间复杂序列中的单个目标观察到的最大 DL。在所有条件下，老年听众的表现都比年轻听众差，但在时间复杂的刺激条件下观察到与年龄相关的最大差异。没有观察到听力损失的系统性影响。 (C) 2004 年美国声学学会。
The experiments examined age-related changes in temporal sensitivity to increments in the interonset intervals (IOI) of components in tonal sequences. Discrimination was examined using reference sequences consisting of five 50-ms tones separated by silent intervals; tone frequencies were either fixed at 4 kHz or varied within a 2-4-kHz range to produce spectrally complex patterns. The tonal IOIs within the reference sequences were either equal (200 or 600 ms) or varied individually with an average value of 200 or 600 ms to produce temporally complex patterns. The difference limen (DL) for increments of IOI was measured. Comparison sequences featured either equal increments in all tonal IOIs or increments in a single target IOI, with the sequential location of the target changing randomly across trials. Four groups of younger and older adults with and without sensorineural hearing loss participated. Results indicated that DLs for uniform changes of sequence rate were smaller than DLs for single target intervals, with the largest DLs observed for single targets embedded within temporally complex sequences. Older listeners performed more poorly than younger listeners in all conditions, but the largest age-related differences were observed for temporally complex stimulus conditions. No systematic effects of hearing loss were observed. (C) 2004 Acoustical Society of America.