Boys Town National Research Hospital, 555 North 30th Street, Omaha, Nebraska 68131, USA.
J Acoust Soc Am. 2012 Feb;131(2):1282-95. doi: 10.1121/1.3672654.
The reliability of distortion-product otoacoustic emission (DPOAE) measurements and their relation to loudness measurements was examined in 16 normal-hearing subjects and 58 subjects with hearing loss. The level of the distortion product (L(d)) was compared across two sessions and resulted in correlations that exceeded 0.90. The reliability of DPOAEs was less when parameters from nonlinear fits to the input/output (I/O) functions were compared across visits. Next, the relationship between DPOAE I/O parameters and the slope of the low-level portion of the categorical loudness scaling (CLS) function (soft slope) was assessed. Correlations of 0.65, 0.74, and 0.81 at 1, 2, and 4 kHz were observed between CLS soft slope and combined DPOAE parameters. Behavioral threshold had correlations of 0.82, 0.83, and 0.88 at 1, 2, and 4 kHz with CLS soft slope. Combining DPOAEs and behavioral threshold provided little additional information. Lastly, a multivariate approach utilizing the entire DPOAE I/O function was used to predict the CLS rating for each input level (dB SPL). Standard error of the estimate when using this method ranged from 2.4 to 3.0 categorical units (CU), suggesting that DPOAE I/O functions can predict CLS measures within the CU step size used in this study (5).
在 16 名听力正常的受试者和 58 名听力损失的受试者中，检查了失真产物耳声发射（DPOAE）测量的可靠性及其与响度测量的关系。在两次会议上比较了失真产物的水平（L(d)），结果相关系数超过 0.90。当比较两次就诊时输入/输出（I/O）函数的非线性拟合的 DPOAE 参数时，DPOAE 的可靠性降低。接下来，评估了 DPOAE I/O 参数与类别响度标度（CLS）函数低水平部分（软斜率）之间的关系。在 1、2 和 4 kHz 处观察到 CLS 软斜率与综合 DPOAE 参数之间的相关性为 0.65、0.74 和 0.81。行为阈值与 CLS 软斜率在 1、2 和 4 kHz 处的相关性分别为 0.82、0.83 和 0.88。结合 DPOAE 和行为阈值提供的信息很少。最后，使用整个 DPOAE I/O 函数的多元方法用于预测每个输入水平（dB SPL）的 CLS 等级。使用这种方法时，估计的标准误差范围为 2.4 到 3.0 个类别单位（CU），这表明 DPOAE I/O 函数可以在本研究中使用的 CU 步长内预测 CLS 测量值（5）。
