AGE EFFECTS ON MEASURES OF AUDITORY DURATION DISCRIMINATION
AGE EFFECTS ON MEASURES OF AUDITORY DURATION DISCRIMINATION
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DOI：
10.1044/jshr.3703.662
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发表时间：
1994-06-01
期刊：
影响因子：
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通讯作者：
GORDONSALANT, S
中科院分区：
文献类型：
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作者：
FITZGIBBONS, PJ;GORDONSALANT, S
这项研究使用测量持续时间歧视的心理物理任务检查了年轻成人和老年听众的听觉时间敏感性。实验中的听众被分为听力敏感度正常和轻度至中度倾斜感音神经性听力损失的年轻和老年受试者。所有任务中的时间阈值均使用以 500 Hz 和 4000 Hz 为中心的音调刺激通过自适应强制选择程序进行测量。测量突发音（250 毫秒参考持续时间）和突发音之间的静默间隔（250 毫秒和 6.4 毫秒参考持续时间）的持续时间差异。结果显示，当参考持续时间为 250 毫秒时，老年听众对音调和无声间隔的持续时间辨别力均减弱。听力损失不会影响这些结果。对短暂时间间隙（6.4 毫秒）的辨别受到年龄和听力损失的影响，但这些影响在所有听众中并不一致。对于大多数持续时间歧视条件，刺激频率的影响并不明显。
This study examined auditory temporal sensitivity in young adult and elderly listeners using psychophysical tasks that measured duration discrimination. Listeners in the experiments were divided into groups of young and elderly subjects with normal hearing sensitivity and with mild-to-moderate sloping sensorineural hearing loss. Temporal thresholds in all tasks were measured with an adaptive forced-choice procedure using tonal stimuli centered at 500 Hz and 4000 Hz. Difference limens for duration were measured for tone bursts (250 msec reference duration) and for silent intervals between tone bursts (250 msec and 6.4 msec reference durations). Results showed that the elderly listeners exhibited diminished duration discrimination for both tones and silent intervals when the reference duration was 250 msec. Hearing loss did not affect these results. Discrimination of the brief temporal gap (6.4 msec) was influenced by age and hearing loss, but these effects were not consistent across all listeners. Effects of stimulus frequency were not evident for most of the duration discrimination conditions.