COMPARISONS BINAURAL PROCESSING AT LOW & HIGH FREQUENCI

描述：(改编自《调查员摘要》) 建议的研究是对以下方面的评估、表征和比较 双耳听觉系统处理耳间时间差异(ITDS) 在高频和低频下。这项研究的主要目的是 调查双耳是否以及在多大程度上存在众所周知的差异 在低频率和高频下的处理源于 调节性能或源于固有差异的双耳机制 在作为双耳系统输入的单耳神经信息中。 实验涉及“转置”或外差整流和低通， 从低频信息到高频信息。我们将创造高频 其包络通常包含类似信息的刺激 可从低频刺激的精细结构中获得。这个 从探测和定侧实验中获得的数据将揭示1) 在低频和高频下对ITDS的相对敏感度以及 推定的内部互相关可以获得哪些信息 机制作为中心频率的函数被类似地处理，并且2) 对耳间差异的处理程度由 移位的高频刺激受到保护，不受双耳“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.