兔畸变产物耳声发射中水平依赖性最小值的来源。
Source of level dependent minima in rabbit distortion product otoacoustic emissions.
作者信息
Fahey P F, Stagner B B, Martin G K
机构信息
Department of Physics/EE, University of Scranton, Scranton, Pennsylvania 18510, USA.
出版信息
J Acoust Soc Am. 2008 Dec;124(6):3694-707. doi: 10.1121/1.3003078.
Abstract
Sharp level dependent minima (commonly called nulls or notches) in the distortion product otoacoustic emissions (DPOAEs) have been postulated to be due to two different mechanisms. It is shown here that the level dependent nulls in rabbit 2f(1)-f(2) DPOAEs carry the signature of the mixing of a third order nonlinear term with a fifth order nonlinear term. This suggests that the minima are not due to the mixing of signals from two different physical sites of origin, but rather are due to the nature of the nonlinearity itself. Model simulations show that null production is indifferent to several properties of nonlinear input/output functions.
摘要
畸变产物耳声发射（DPOAE）中尖锐的电平依赖性极小值（通常称为零点或凹口）被假定是由两种不同机制引起的。本文表明，兔2f(1)-f(2) DPOAE中的电平依赖性零点带有三阶非线性项与五阶非线性项混合的特征。这表明极小值并非源于两个不同物理起源部位信号的混合，而是源于非线性本身的性质。模型模拟表明，零点的产生与非线性输入/输出函数的几个特性无关。
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