Venkatappa Kavana G, Shankar Vinutha, Annamalai Nachal
Department of Physiology, Sri Devaraj Urs Medical College, Sri Devaraj Urs University, Tamaka, Kolar - 563 101.
Indian J Physiol Pharmacol. 2012 Jan-Mar;56(1):69-73.
The objectives of the present study were to (i) estimate noise levels at major traffic junctions in Bengaluru City, and (ii) assess the knowledge, attitude and practices of traffic policemen deputed at those junctions towards the auditory effects caused by noise pollution. The present questionnaire based study was carried among 60 traffic policemen. Road traffic noise was measured at different places in Bengaluru city using Sound level meter and it ranged from 71.2 to 91 dB. The questionnaire included the questions regarding the self assessment of the policemen about their hearing ability, past and present exposure to loud sound and the use of personal protective devices such as ear plugs and ear muffs. The questionnaire was filled by the subjects and the data was analyzed. The mean age was 42.2 +/- 7.4 years and the mean year of exposure was 10.82 +/- 8.53 yrs. Only 3.33% of the subjects felt that their hearing ability was below average. Thirteen subjects reported that they usually missed some conversation over phone while 25% reported similar condition while talking to someone in crowd. 16.66% had work related tinnitus (> once a day) and experienced it more during working hours. None of them used ear plugs/ear muffs and the reason for non-usage was nonavailability (100%). The self assessment of hearing by traffic policemen suggests that most of the traffic policemen have normal hearing. However, a systematic study with Audiometry of these subjects is recommended.
（i）估算班加罗尔市主要交通路口的噪音水平；（ii）评估派驻在这些路口的交警对噪音污染造成的听觉影响的知识、态度和做法。本研究基于问卷调查，对60名交警进行了调查。使用声级计在班加罗尔市的不同地点测量道路交通噪音，其范围为71.2至91分贝。问卷包括有关交警对自身听力能力的自我评估、过去和现在暴露于高声的情况以及使用耳塞和耳罩等个人防护设备的问题。受试者填写问卷并对数据进行分析。平均年龄为42.2 +/- 7.4岁，平均暴露年限为10.82 +/- 8.53年。只有3.33%的受试者认为他们的听力能力低于平均水平。13名受试者报告说他们通常在打电话时错过一些对话，25%的受试者报告在人群中与人交谈时有类似情况。16.66%的人有与工作相关的耳鸣（>每天一次），并且在工作时间更频繁地出现。他们中没有人使用耳塞/耳罩，不使用的原因是无法获得（100%）。交警的听力自我评估表明，大多数交警听力正常。然而，建议对这些受试者进行听力测定的系统研究。
