首页> 美国卫生研究院文献>PLoS Clinical Trials >A Role of Medial Olivocochlear Reflex as a Protection Mechanism from Noise-Induced Hearing Loss Revealed in Short-Practicing Violinists
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A Role of Medial Olivocochlear Reflex as a Protection Mechanism from Noise-Induced Hearing Loss Revealed in Short-Practicing Violinists

机译:练习短小提琴家中内侧乳突反射作为一种保护机制,可防止噪声引起的听力损失

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摘要

Previous studies have indicated that extended exposure to a high level of sound might increase the risk of hearing loss among professional symphony orchestra musicians. One of the major problems associated with musicians’ hearing loss is difficulty in estimating its risk simply on the basis of the physical amount of exposure, i.e. the exposure level and duration. The aim of this study was to examine whether the measurement of the medial olivocochlear reflex (MOCR), which is assumed to protect the cochlear from acoustic damage, could enable us to assess the risk of hearing loss among musicians. To test this, we compared the MOCR strength and the hearing deterioration caused by one-hour instrument practice. The participants in the study were music university students who are majoring in the violin, whose left ear is exposed to intense violin sounds (broadband sounds containing a significant number of high-frequency components) during their regular instrument practice. Audiogram and click-evoked otoacoustic emissions (CEOAEs) were measured before and after a one-hour violin practice. There was a larger exposure to the left ear than to the right ear, and we observed a left-ear specific temporary threshold shift (TTS) after the violin practice. Left-ear CEOAEs decreased proportionally to the TTS. The exposure level, however, could not entirely explain the inter-individual variation in the TTS and the decrease in CEOAE. On the other hand, the MOCR strength could predict the size of the TTS and CEOAE decrease. Our findings imply that, among other factors, the MOCR is a promising measure for assessing the risk of hearing loss among musicians.
机译:先前的研究表明,长时间接触高音质可能会增加专业交响乐团音乐家听力损失的风险。与音乐家的听力损失有关的主要问题之一是难以仅根据暴露的物理量,即暴露水平和持续时间来估计其风险。这项研究的目的是要检查为保护耳蜗免受听觉损害而进行的内侧少耳反射(MOCR)测量是否可以使我们评估音乐家中听力损失的风险。为了测试这一点,我们比较了MOCR强度和一小时器械练习引起的听力下降。该研究的参与者是音乐小提琴专业的大学生,他们的左耳在常规乐器练习中会暴露于强烈的小提琴声音(包含大量高频成分的宽带声音)中。一小时小提琴练习前后,对听力图和点击诱发的耳声发射(CEOAE)进行了测量。小提琴练习后,左耳的暴露量比右耳的暴露量大,并且我们观察到左耳的特定临时阈值移位(TTS)。左耳CEOAEs与TTS成比例下降。然而,暴露水平不能完全解释TTS之间的个体差异和CEOAE的下降。另一方面,MOCR强度可以预测TTS的大小和CEOAE的减少。我们的发现表明,除其他因素外,MOCR是评估音乐家听力损失风险的有前途的措施。

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