Investigation of DPOAE components in time and frequency

描述（由申请人提供）：耳声发射（oae）是耳蜗中产生的信号，可能是负责耳朵正常功能的活跃生理过程的副产物。用两种纯音同时刺激耳蜗，记录畸变产物oae （dpoae）。Talmadge等人（1998）提出了一个模型，其中耳道中记录的dpoae被表示为由多个分量组成的复合信号。最近的研究集中在检查该模型中确定的单个DPOAE组件的特定属性。本研究的目的是探讨输入水平对DPOAE主要成分的影响，并考察刺激水平不同时耳蜗内是否存在多重内反射。此外，在这些实验中获得的数据将允许估计几个模型参数。总的来说，这些研究结果将提高我们对DPOAE产生机制和耳蜗基本力学的理解。这些知识将不可避免地提高我们使用dpoae作为临床和研究工具的能力。

DESCRIPTION (provided by applicant): Otoacoustic emissions (OAEs) are signals generated in the cochlea, presumably as a byproduct of active physiological processes responsible for normal functioning of the ear. Distortion product OAEs (DPOAEs) are recorded by stimulating the cochlea simultaneously with two pure tones. A model in which DPOAEs recorded in the ear canal are represented as a composite signal comprised of contributions from several components has been proposed by Talmadge et al., (1998). Research recently has focused on the examination of specific properties of individual DPOAE components identified in this model. The goals of this study are to investigate the effect of input level on the main DPOAE components, and to examine the existence of multiple internal reflections in the cochlea as stimulus level is varied. Additionally, the data obtained during these experiments will allow the estimation of several model parameters. Overall, the results of these studies will improve our understanding of the DPOAE generative mechanisms and the basic mechanics of the cochlea. Such knowledge will invariably improve our ability to use DPOAEs as both a clinical and a research tool.