日本一位耳科专家,最近发明了一种用硅铜胶制造的高频噪声防护耳塞,它为细小螺旋形气道。使用这种耳塞,低频声响,如人声等可进入耳道,而高频噪声却大部分被过滤吸收。 这种耳塞又有平衡气压的作用,当大气压力每变化100毫米时,它便会使耳塞内外气压所需的平衡时间延长50%。 这种 An otolaryngologist in Japan recently invented a high-frequency noise protection earplug made of silicone rubber, which is a tiny spiral airway. Use this earplug, low-frequency sound, such as human voice can enter the ear canal, while most of the high-frequency noise is filtered and absorbed. This kind of earplug has the function of balancing the air pressure, and when the atmospheric pressure changes 100mm, it will make the earplug air pressure inside and outside the required balance time by 50%. This