Relationships among age-related differences in gap detection and word recognition
Relationships among age-related differences in gap detection and word recognition
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DOI：
10.1121/1.428446
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发表时间：
2000-03-01
影响因子：
2.4
通讯作者：
Frisina, DR
中科院分区：
文献类型：
--
作者：
Snell, KB;Frisina, DR
在两项研究中，探讨了听力正常或轻度感音神经性耳聋受试者在间隙检测和单词识别方面的年龄相关差异之间的关系。在第一项研究中，获得了40名年轻受试者和40名年长受试者的GAP阈值。间隙由150毫秒的调制低通噪声脉冲串携带，截止频率为1或6千赫。在三种背景条件下，噪声爆发的总体水平为80dBSPL。年轻组的平均GAP阈值在2.6至7.8ms之间，老年组在3.4至10.0ms之间。在所有六种情况下，老年组的平均差距阈值都明显较大。在两个年龄组中，缝隙阈值与听力阈值均无显着相关性，但在年轻组中，1 kHz的缝隙阈值随着年龄的增长而增加。在第二项研究中，研究了66名受试者的GAP听阈值、听音听阈值和听阈之间的关系。与年长的受试者相比，年轻组的受试者识别受试者的受试者与受试者之间的比例明显较低(更困难)。在年轻组中，在高频掩蔽条件下，说话中的受试者阈值与间隙阈值显著相关。在老年组中，听障阈值、间隙听阈和听阈之间没有显著的相关性，但听障阈值和两种听阈随年龄的增长而显著增加。这些结果表明，在整个成年期，听觉处理过程中与年龄相关的显著变化。具体地说。与年龄相关的时间敏锐度的变化可能比与年龄有关的单词识别变化开始的时间早几十年。(C)2000年美国声学学会。[S0001-4966(00)01303-5]。
The relationships among age-related differences in gap detection and word recognition in subjects with normal hearing or mild sensorineural hearing loss were explored in two studies. In the first study, gap thresholds were obtained for 40 younger and 40 older subjects. The gaps were carried by 150-ms, modulated, low-pass noise bursts with cutoff frequencies of 1 or 6 kHz. The noise bursts were presented at an overall level of 80 dB SPL in three background conditions. Mean gap thresholds ranged between 2.6 and 7.8 ms for the younger age group and between 3.4 and 10.0 ms for the older group. Mean gap thresholds were significantly larger for the older group in all six conditions. Gap thresholds were not significantly correlated with audiometric thresholds in either age group but the 1-kHz gap thresholds increased with age in the younger group. In the second study, the relationships among gap thresholds, spondee-in-babble thresholds, and audiometric thresholds of 66 subjects were examined. Compared with the older subjects, the younger group recognized the spondees at significantly lower (more difficult) spondee-to-babble ratios. In the younger group, spondee-in-babble thresholds were significantly correlated with gap thresholds in conditions of high-frequency masking. In the older group, spondee-in-babble thresholds, gap thresholds, and audiometric thresholds were not significantly correlated, but the spondee-in-babble thresholds and two audiometric thresholds increased significantly with age. These results demonstrate that significant age-related changes in auditory processing occur throughout adulthood. Specifically. age-related changes in temporal acuity may begin decades earlier than age-related changes in word recognition. (C) 2000 Acoustical Society of America. [S0001-4966(00)01303-5].