在目前的噪声控制技术水平下,要对噪声源采取减噪措施或在传输路径用隔声方法把噪声减低到对人无害的程度常常是不经济,甚至是不可能的。在这种场合,以使用个人防护用品较为有利。解放以来,由于党和政府对工人健康的关怀,我国有关部门曾先后研制和生产了很多种类型的防噪声个人用品,其中尤以耳塞较为普遍。这些个人防护用品在防止噪声对作业工人的健康损害上都有一定作用,但因佩戴不舒适,用法烦琐等缺点,现场至今仍无法推广使用。据报导,瑞典近年来生产了一种超细玻璃纤维护耳棉,克服了现有各种护耳器的弱点, Under the present level of noise control technology, it is often not economical, or even impossible, to apply noise reduction measures to noise sources or to reduce noise to harmless levels by sound insulation on the transmission path. In this case, the use of personal protective equipment is more favorable. Since the liberation, due to the party and government’s concern for the health of workers, China’s relevant departments have successively developed and produced many kinds of anti-noise personal items, among which earplugs are more common. These personal protective equipment to prevent noise on the health of workers have a certain role, but due to wear uncomfortable, cumbersome usage and other shortcomings, the scene is still unable to promote the use. It is reported that Sweden in recent years produced an ultra-fine fiberglass earmuffs, to overcome the existing weakness of various ear protectors,