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一、引言 护耳器标准与其声衰减测量方法的研究,涉及到护耳器的产品系列化、标准化问题。目前,国际上有数十个国家公布了本国的护耳器标准与其声衰减测量方法。 二、历史 从廿世纪廿年代国外就有人开始搜集护耳器主观听阈和客观测量方法。最初的研究是为了测量电讯装置如耳机等。到五十年代,有的国家已经制定出主观测量法。根据测量所使用的声源不同,大致可分为两个阶段叙述。
I. INTRODUCTION The study on the standard of ear protection and its sound attenuation measurement method involves the serialization and standardization of the ear protection device. At present, there are dozens of countries in the world that have promulgated the national standard for ear protection and the method for measuring sound attenuation. Second, history From the 20th century, 20 foreign countries began to collect ear hearing aids subjective threshold and objective measurement methods. The initial study was to measure telecommunications devices such as headphones and the like. By the 1950s, some countries had made subjective measures. According to the measurement of different sound sources, can be roughly divided into two stages described.