Block M G, Wiley T L
J Speech Hear Res. 1979 Jun;22(2):295-310. doi: 10.1044/jshr.2202.295.
Acoustic-reflex growth functions and loudness-balance judgments were obtained for three normal-hearing subjects with normal middle-ear function. The hypothesis that acoustic reflex-activating signals producing proportionately equal acoustic-impedance changes are judged equal in loudness was evaluated. The mean acoustic impedance and associated standard deviations were computed for the baseline (static) and activator (reflex) portions of each reflex event. An acoustic-impedance change exceeding two standard deviations of baseline was defined as the criterion acoustic-reflex response. Acoustic impedance was measured as a function of activator SPL for broadband noise and a 1000-Hz tone from criterion magnitude to the maximum acoustic impedance (or 120-dB SPL). This was defined as the dynamic range of reflex growth. Loudness-balance measurements were made for the 1000-Hz tone and broadband noise at SPL's representing 30, 50, and 70% of the individual dynamic range. The data supported the hypothesis.
对三名中耳功能正常的听力正常受试者进行了声反射增长函数和响度平衡判断。评估了这样一个假设：产生成比例相等声阻抗变化的声反射激活信号在响度上被判断为相等。计算了每个反射事件的基线（静态）和激活器（反射）部分的平均声阻抗及相关标准差。超过基线两个标准差的声阻抗变化被定义为标准声反射反应。在从标准幅度到最大声阻抗（或120 dB SPL）的范围内，测量了宽带噪声和1000 Hz纯音作为激活器声压级函数的声阻抗。这被定义为反射增长的动态范围。在代表个体动态范围30%、50%和70%的声压级下，对1000 Hz纯音和宽带噪声进行了响度平衡测量。数据支持了该假设。
