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不少用助听器者是在噪声环境中工作,这就提出了在防止因噪声暴露而耳聋进一步加重的问题。作者比较了不同材料、不同形式的耳模(ear mold)对噪声的衰减作用。不同的耳模包括用硬的丙烯酸脂(acrylic)做的和用半软的乙基异丁烯酸复合物vinylflex做的,护壳耳模(shell mold)和骨架耳模(skeleton mold),标准式的和卡于耳屏式的。每个耳模中均有13号标准管。还比较了E-A-R型助听器耳模中间有0.125英寸的孔并插入13号标准管。结果表明:(1)所有耳模对高频率的衰减
Many people who use hearing aids work in a noisy environment, which raises the issue of preventing further deafness due to noise exposure. The authors compared the attenuation of noise with different materials and different types of ear molds. Different ear molds include those made of hard acrylic and vinylflex, a semi-soft ethyl methacrylate copolymer shell mold and skeleton mold, standard And the card in the tragus-style. There is a standard 13 gauge tube in each ear mold. Also compared with the 0.125-inch hole in the middle of the E-A-R hearing aid earmold and inserted into a standard 13 gauge tube. The results show that: (1) all the ear mold attenuation to high frequency