护耳器使用现状评述

Comment on the Current of the Use of Hearing Protector

研究表明：护耳器现场使用实际声衰减值低于实验室值，其原因是护耳器的实验室测量条件较为严格。工人在现场实际使用护耳器时，未能同实验室中的受试者一样佩戴护耳器，因而获得的护耳器声衰减比实验室所测得的值低。另一方面，在８小时强噪声环境中工作期间，未自始至终佩戴护耳器，则也达不到预期的保护听力的效果。笔者还综合分析和评述了护耳器现场使用时实际声衰减值降低的原因。

The real decibel attenuation of the hearing protector in the workplace is lower than the value measured in the laboratory, because the measuring conditions in the laboratory are more strict. When the hearing protector is used in the workplace,usually it is worn not so properly as in the laboratory or not in proper fit,as a result,the decibel attenuation achieved is lowered.and when workers exposed to noise environment for 8 hrs.,they usually do not insist to wear the the hearing protectors for whole period,and expected effect could not be achieved.Other influential factors for decibel attenuation are comprehensively analyzed too,and some practical suggestions are also made.