当今世界各国研制和生产的护耳器品种繁多,根据使用者所处环境的特点,选择性能理想、经济、佩戴舒适的护耳器是目前人们研究的主要课题之一。为此,上百种花样繁新的护耳器取代了陈旧、简陋的护耳装置,给在噪声环境中作业的广大人员带来了福音。众多 Nowadays, a wide range of ear protectors are developed and manufactured in various countries around the world. According to the characteristics of the users’ environment, choosing ear protectors with good performance, economy and wearing comfort is one of the major topics studied by people at present. To this end, Hundreds of new tricks to replace the old, simple ear protection device, to work in a noisy environment to bring the good news of the general staff. numerous