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引用次数: 0
摘要
本研究的主要目的是探讨对侧刺激对听觉滤过器形状的影响。在有和无对侧刺激的情况下，用陷波噪声法测量正常听力听者在1和2 kHz的听觉滤波器。宽带噪声作为对侧刺激在三个水平:50、60和70 dB SPL。结果表明，对侧50 dB SPL的刺激在2 kHz时略微增加了频率选择性(即减少了听觉滤波器带宽)，提示耳蜗内侧耳蜗束等听觉传出纤维可能起着提高耳蜗频率选择性的作用。这种耳蜗频率选择性的改善似乎依赖于对侧刺激的信号频率和强度。
Effect of Contralateral Stimulation on Auditory Filter Bandwidth: A Preliminary Study
The main goal of this study was to examine the effect of contralateral stimulation on auditory filter shape. Auditory filter was measured at 1 and 2 kHz for normal-hearing listeners using notched-noise method with and without contralateral stimulation presented. A broadband noise was presented as contralateral stimulation at three levels: 50, 60, and 70 dB SPL. Results indicated that contralateral stimulation at 50 dB SPL slightly increased frequency selectivity (i.e. reduced auditory filter bandwidth) for 2 kHz, suggesting that auditory efferent fibers such as medial olivocochlear bundles may function to improve frequency selectivity of the cochlear. Such improvement in the cochlear frequency selectivity appeared to be dependent on signal frequency and intensity of contralateral stimulation.
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