Periodogram based tests for distortion product otoacoustic emissions

被引:3
作者
Craigmile, PF
King, WM
机构
[1] Ohio State Univ, Dept Stat, Columbus, OH 43210 USA
[2] Ohio State Univ, Dept Speech & Hearing Sci, Columbus, OH 43210 USA
关键词
D O I
10.1121/1.1760793
中图分类号
O42 [声学];
学科分类号
070206 ; 082403 ;
摘要
Distortion product otoacoustic emissions (DPOAEs) are an important nonbehavioral measure of cochlear function, which provides a close analogue of the behavioral pure-tone audiogram. DPOAEs are sinusoidal distortion products (DPs) produced by nonlinearities in the healthy cochlea. Detection of DPs is accomplished in the Fourier domain with a periodogram based test. The test compares the power in the DP periodogram bin to a noise estimate derived from a certain number of the surrounding bins. Statistical properties of this test, to date have only been examined by constructing receiver operator characteristics curves derived from DPOAE measurements in normal and hearing impaired individuals. In this paper the null distribution of this order-statistic based test is explicitly derived, and via simulations intended to mimic the nonwhite features of real-ear noise measurements, the power of the test is demonstrated. These simulations demonstrate that a local F test is more powerful than this DPOAE test, with critical values that are easier to calculate. Although the power of both tests increase with an increasing number of bins, the improvement is negligible at around four bins. Since the power of both tests decrease at lower DP frequencies, it is not recommended to use a large number of bins. (C) 2004 Acoustical Society of America.
引用
收藏
页码:442 / 451
页数:10
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