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Med Probl Perform Art. 2022 Jun;37(2):78-88. doi: 10.21091/mppa.2022.2013.
High-fidelity premolded earplugs (HiFi HPDs) are designed to provide relatively uniform attenuation across frequencies. The primary goal of this study was to verify the amount and flatness of individual user attenuation. HiFi HPD attenuation was measured using real-ear attenuation at threshold (REAT) measurements under circumaural earphones. Participants were 16 adults tested using commercial HiFi HPDs marketed for use at recreational music events and/or for use by musicians. There was significant individual variation in attenuation both within and across HiFi HPD brands. In addition to significant differences in achieved attenuation, there were significant differences in the uniformity of the attenuation. These data suggest verification of attenuation is important in musicians who are at risk for music-induced hearing disorders even when using "over-the-counter" uniform-fit HPDs.
高保真预成型耳塞（HiFi HPD）旨在提供相对均匀的各频率衰减。本研究的主要目的是验证个体用户衰减的量和均匀性。HiFi HPD 的衰减通过在耳罩式耳机下使用真耳阈衰减（REAT）测量进行测量。参与者为 16 名成年人，使用商业 HiFi HPD 进行测试，这些 HPD 旨在用于娱乐音乐活动和/或音乐家使用。HiFi HPD 品牌内部和之间的衰减都存在显著的个体差异。除了达到的衰减有显著差异外，衰减的均匀性也有显著差异。这些数据表明，即使使用“非处方”均码 HPD，对于有音乐性听力障碍风险的音乐家来说，衰减的验证也很重要。
