A comparison of the effects of broadband masking noise on the auditory brainstem response in young and older adults.
A comparison of the effects of broadband masking noise on the auditory brainstem response in young and older adults.
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DOI：
10.1044/1059-0889(2002/004
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发表时间：
2002-06-01
影响因子：
1.8
通讯作者：
Sims, Donald
中科院分区：
文献类型：
--
作者：
Burkard, Robert F;Sims, Donald
我们研究了同侧直接，连续，宽带噪声对听觉脑干反应（ABR）波I和V潜伏期和振幅的影响，在年轻人与老年人。假设年龄可能会影响掩蔽噪声对ABR峰值潜伏期和/或振幅的影响，因为老年人在背景噪声中处理语音的能力经常受到投诉。年轻人的听阈为20 dB HL或更好的倍频程频率从250到8,000赫兹。一部分老年研究参与者的阈值为20 dB HL或更好的频率，但其他人的阈值高达45 dB HL。收集所有数据并使用尼科莱Bravo进行分析。将电极放置在鼓膜上（以及高前额和对侧乳突上），并使用115 dB pSPL的点击水平来最大化波I振幅。掩蔽条件包括无噪声控制和噪声水平范围为20至70 dB有效掩蔽，步长为10 dB。随着噪声水平的增加，两个年龄组的波I潜伏期变化不大，但波V潜伏期和I-V间期显著增加。峰值振幅随噪声水平的增加而降低。老年组的平均振幅较小，最明显的是I波。老年组的平均峰值潜伏期更大，但各年龄组的I-V间期相似，噪声水平上的峰值潜伏期和I-V间期变化也相似。比较了在所有频率下听力符合20 dB HL标准的老年人（老年人-更好）与不符合此标准的老年人（老年人-更差）的ABR参数。在所有噪声水平下，老年组的平均I波潜伏期更长，V波潜伏期和I-V间期更短。老年-较好组和老年-较差组的平均I波和V波振幅相似。在听力正常或接近正常的参与者中，ABR随年龄增长的变化包括潜伏期的小幅增加和I波振幅的大幅降低。同侧直接掩蔽噪声对年轻人和老年人的点击诱发ABR的影响是相似的。
We examined the effects of ipsilateral-direct, continuous, broadband noise on auditory brainstem response (ABR) wave I and V latencies and amplitudes in young adult versus older adult humans. It was hypothesized that age might influence the effects of masking noise on ABR peak latencies and/or amplitudes, given the frequent complaint of older persons' ability to process speech in background noise. Young adults had hearing thresholds of 20 dB HL or better for the octave frequencies from 250 to 8,000 Hz. A subset of older study participants had thresholds of 20 dB HL or better across frequency, but others had thresholds up to 45 dB HL. All data were collected and analyzed with a Nicolet Bravo. An electrode was placed on the tympanic membrane (as well as on high forehead and contralateral mastoid), and a click level of 115 dB pSPL was used to maximize wave I amplitude. Masker conditions included a no-noise control and noise levels ranging from 20 to 70 dB effective masking, in 10 dB steps. With increasing noise level, both age groups showed minimal changes in wave I latency, but substantial increases in wave V latency and I-V interval. Peak amplitudes decreased with increasing noise level. Mean amplitudes were smaller for the older group, most notably for wave I. Mean peak latencies were greater in the older group, but the I-V interval was similar across age groups, as was the change in peak latencies and I-V interval across noise level. ABR parameters for the older adults with hearing meeting the 20-dB HL criterion at all frequencies (older-better) were compared to those who didn't meet this criterion (older-worse). Mean wave I latency was greater and wave V latency and I-V interval were smaller for the older-worse group at all noise levels. Mean wave I and V amplitudes were similar for the older-better and older-worse groups. In participants with normal or near-normal hearing, ABR changes with increasing age included small latency increases and a substantial reduction in wave I amplitude. The effects of ipsilateral-direct masking noise on the click-evoked ABR are similar for young and older adults.