COMPARISONS BINAURAL PROCESSING AT LOW & HIGH FREQUENCI

描述：（改编自研究者摘要） 建议的研究是一个评估，表征，并比较如何 双耳听觉系统处理耳间时间差异（ITD） 在高频和低频。研究的主要目的是 调查是否和程度，众所周知的差异，在双耳 低频和高频的处理源于 调节性能或源于固有差异的双耳机制 作为双耳系统输入的单声道神经信息。 实验涉及“转置”或外差整流和低通， 低频信息到高频。我们将创造高频率的 其包络包含与正常情况下类似信息的刺激 可以从低频刺激的精细结构中获得。的 从检测和侧化实验获得的数据将揭示1） 在低频和高频下对ITD的相对敏感性以及 哪些信息可用于假定的内部互相关 类似地处理机制，作为中心频率的函数，以及2） 传达的耳间差异的处理程度 调换的高频刺激被保护免受双耳“干扰” 这通常发生在“常规”高频刺激下。

DESCRIPTION: (Adapted from the Investigator's Abstract) The objectives of the proposed research are an evaluation, characterization, and comparison of how the binaural auditory system processes interaural temporal disparities (ITDs) at high and low frequencies. The principal aim of the research is to investigate whether and the degree to which well-known differences in binaural processing at low and high frequencies stem from true differences in the binaural mechanisms that mediate performance or stem from inherent differences in the monaural neural information that serves as input to the binaural system. The experiments involve "transposing" or heterodyning rectified and low-passed, low-frequency information to high frequencies. We will create high-frequency stimuli whose envelopes contain information that is like that normally available from the fine-structure of stimuli presented at low frequencies. The data obtained from detection and lateralization experiments will reveal 1) the relative sensitivity to ITDs at low and high frequencies and the degree to which information available to the putative internal cross-correlation mechanism is processed similarly, as a function o center frequency and 2) the degree to which the processing of interaural disparities conveyed by transposed, high-frequency stimuli is protected from binaural "interference" that typically occurs with "conventional" high-frequency stimuli.