Stewart M, Konkle D F, Simpson T H
Division of Audiology, Department of Communication Disorders, Central Michigan University, Mt. Pleasant, MI, USA.
Ear Nose Throat J. 2001 Jan;80(1):32-4, 36, 38-40.
Hearing sensitivity for an experimental group of 278 industrial workers who engaged in recreational shooting was compared with that of an age-matched control group of 278 nonshooting industrial workers to examine the effect of gunfire exposure on auditory thresholds. The influence of age and the number of unprotected gunshot exposures per year also was examined. The subjects in the experimental group completed a questionnaire to define the types of firearms used, the number of years shooting, and the number of protected and unprotected gunshot exposures per year. Results revealed that hearing sensitivity for frequencies 3.0, 4.0, and 6.0 kHz for both ears in the experimental group was an average of approximately 5 to 10 dB poorer than that of the control subjects. Although both subject groups demonstrated poorer 3.0-to-6.0-kHz hearing sensitivity for left-ear compared with right-ear listening, the degree of asymmetry between ears was greater for the experimental subjects. Older shooters had more hearing loss and greater threshold asymmetry than younger shooters, but there was no significant relationship between hearing sensitivity and the number of unprotected exposures per year. This latter finding was attributed to a fourfold increase in the number of unprotected annual exposures that were reported by younger shooters, who had inherently better hearing than did the older shooters.
将278名从事娱乐性射击的产业工人组成的实验组的听力敏感度，与278名不射击的年龄匹配的产业工人对照组的听力敏感度进行比较，以研究枪声暴露对听觉阈值的影响。同时还研究了年龄以及每年无防护枪声暴露次数的影响。实验组的受试者完成了一份问卷，以确定所使用的枪支类型、射击年限以及每年有防护和无防护枪声暴露的次数。结果显示，实验组双耳在3.0、4.0和6.0千赫兹频率的听力敏感度平均比对照组受试者差约5至10分贝。虽然两个受试者组在左耳3.0至6.0千赫兹的听力敏感度均比右耳差，但实验组受试者双耳之间的不对称程度更大。年龄较大的射击者比年轻射击者有更多的听力损失和更大的阈值不对称，但听力敏感度与每年无防护暴露次数之间没有显著关系。后一项发现归因于年轻射击者报告的每年无防护暴露次数增加了四倍，而年轻射击者本身的听力比年长射击者更好。
