Cox R M, Gilmore C
J Speech Hear Res. 1986 Sep;29(3):357-65. doi: 10.1044/jshr.2903.365.
Damped hearing aid frequency responses were compared with undamped responses to determine the effect of response smoothing on speech clarity and on gain received when the hearing aid was adjusted to the preferred listening level (PLL). Damping elements were located in the hearing aid's earhook. Three commercially available hearing aids, two bandwidths, and two speech input levels were evaluated in a completely crossed experimental design. Data were collected using a paired comparison method and 10 hearing-impaired subjects. Results indicated that the undamped frequency responses were judged to produce more clear, pleasant, natural sounding speech than the damped responses (p = .09). Although significant midfrequency peak reduction was achieved through earhook damping, the effects on gain at PLL were negligible.
将阻尼助听器的频率响应与无阻尼响应进行比较，以确定响应平滑对语音清晰度以及将助听器调整到最佳聆听水平（PLL）时所获得增益的影响。阻尼元件位于助听器的耳钩中。在完全交叉实验设计中，对三款市售助听器、两种带宽和两种语音输入水平进行了评估。使用配对比较法收集了10名听力受损受试者的数据。结果表明，与有阻尼响应相比，无阻尼频率响应被判定能产生更清晰、悦耳、自然的语音（p = 0.09）。尽管通过耳钩阻尼实现了显著的中频峰值降低，但对PLL增益的影响可以忽略不计。
