Department of Otolaryngology-Head and Neck Surgery, University of North Carolina at Chapel Hill.
Trends Hear. 2020 Jan-Dec;24:2331216520946133. doi: 10.1177/2331216520946133.
The purpose of this study was to measure the binaural interaction component (BIC) derived from click-evoked auditory brainstem responses (ABRs) using stimuli configured to elicit the Precedence Effect. The hypothesis was that the contribution of binaural processing to echo suppression can be evidenced by a diminished or absent BIC associated with the echo. Ten normal-hearing young adults provided ABRs generated by sequences of click pairs. Results showed that BICs elicited by diotic clicks in isolation were obliterated when those diotic clicks were preceded by a click pair having an interaural time difference of 400 µs and where the interclick interval was 8.4 ms. The presence of the leading click pair increased the latency of the ABR generated by the lagging diotic click pair but did not decrease its amplitude. The results were interpreted as indicating a contribution of binaural processing at the level of the brainstem to echo suppression, at least for the conditions tested here.
本研究旨在使用配置为引发优先效应的刺激来测量源自click-evoked 听觉脑干反应 (ABR) 的双耳相互作用分量 (BIC)。假设对回声抑制的双耳处理的贡献可以通过与回声相关的减小或不存在的 BIC 来证明。10 名听力正常的年轻人提供了由 click 对序列产生的 ABR。结果表明，当对侧 click 对的间隔时间为 400µs 且 click 间隔时间为 8.4ms 时，单独引出的同态 click 产生的 BIC 被消除。领先 click 对的存在增加了滞后同态 click 对产生的 ABR 的潜伏期，但并未降低其幅度。结果解释为表明，至少在本研究中测试的条件下，脑干水平的双耳处理有助于回声抑制。
