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首页> 外文期刊>Seminars in hearing >Relations among Auditory Brainstem and Middle Latency Response Measures, Categorical Loudness Judgments, and Their Associated Physical Intensities
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Relations among Auditory Brainstem and Middle Latency Response Measures, Categorical Loudness Judgments, and Their Associated Physical Intensities

机译：听觉脑干与中潜伏期反应测量、分类响度判断及其相关物理强度之间的关系

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摘要

This study characterizes changes in response properties of toneburst-evoked auditory brainstem responses (ABRs) and/or middle latency responses (MLRs) as a function of perceived loudness and physical intensity of these stimuli and delineates the range of levels corresponding to categorical loudness judgments for these stimuli. ABRs/MLRs were recorded simultaneously to 500- and 2,000-Hz tonebursts in 10 normal-hearing adults at levels corresponding to each listener's loudness judgments for four categories on Contour Test of Loudness. Group mean ABR wave V and MLR wave Pa latency values increased significantly as loudness judgments decreased. Group mean amplitude values for ABR wave V-V and MLR wave Na-Pa increased as the listeners' categorical judgments increased. Listeners assigned a broad range (30 to 40 dB) of stimulus intensities when judging loudness of these stimuli within a specific loudness category. This was true for all four loudness categories and both frequencies. Thus, it appears that tone-evoked ABR/MLR response measures reflect, in part, the listener's perception of loudness. Response latencies are a more sensitive indicator of listener's loudness percept than corresponding response amplitudes. An appreciable range of signal levels was judged to be categorically equivalent across listeners. Thus, limiting how loudness judgments can be applied to prescriptive hearing aid fittings in individuals who cannot provide accurate loudness judgments.
机译：本研究表征了音调诱发的听觉脑干反应 （ABR） 和/或中潜伏期反应 （MLR） 的响应特性的变化，作为这些刺激的感知响度和物理强度的函数，并描绘了与这些刺激的分类响度判断相对应的水平范围。在 10 名听力正常的成年人中同时录制 500 和 2,000 Hz 的 ABR/MLR，其水平对应于每个听众在响度轮廓测试中四个类别的响度判断。随着响度判断的降低，组平均ABR波V和MLR波Pa潜伏期值显著增加。ABR波V-V和MLR波Na-Pa的组平均振幅值随着听者分类判断的增加而增加。听众在特定响度类别内判断这些刺激的响度时，分配了广泛的刺激强度范围（30 至 40 dB）。所有四个响度类别和两个频率都是如此。因此，音调诱发的 ABR/MLR 响应测量似乎在一定程度上反映了听众对响度的感知。响应延迟是比相应的响应幅度更敏感的听者响度感知指标。一个相当范围的信号电平被判断为在听众之间是绝对等效的。因此，限制响度判断如何应用于无法提供准确响度判断的个人的规范性助听器配件。

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