Trine M B, Hirsch J E, Margolis R H
Department of Otorhinolaryngology, Mayo Clinic, Rochester, Minnesota.
Ear Hear. 1993 Dec;14(6):401-7. doi: 10.1097/00003446-199312000-00005.
To determine the effect of middle ear pressure on transient evoked otoacoustic emissions (TEOAEs), emissions were recorded in ears with tympanometric peak pressures < or = -100 daPa and audiometric thresholds < or = 30 dB HL at 500 through 2000 Hz. TEOAEs were alternately recorded at ambient pressure and at the tympanometric peak pressure. As demonstrated for the 14 ears tested, equalization of the middle ear pressure increased TEOAE amplitude. Reproducibility was similarly improved in 12 of 14 ears. Unequalized middle ear pressure attenuated low frequency emissions more than high frequency emissions. These amplitude and spectrum differences were consistent with previously reported observations of the effects of ear canal pressure on otoacoustic emissions. Results suggest that unequalized middle ear pressure may increase the occurrence of false positive failures, if otoacoustic emission testing is used for hearing screenings without consideration of middle ear pressure.
为了确定中耳压力对瞬态诱发耳声发射（TEOAEs）的影响，对鼓室图峰压≤ -100 daPa且在500至2000 Hz频率下听力阈值≤ 30 dB HL的耳朵记录耳声发射。在环境压力和鼓室图峰压下交替记录TEOAEs。正如对14只受试耳朵所证明的，中耳压力的均衡增加了TEOAEs的幅度。14只耳朵中的12只耳朵的可重复性也同样得到改善。未均衡的中耳压力对低频发射的衰减比对高频发射的衰减更大。这些幅度和频谱差异与先前报道的关于耳道压力对耳声发射影响的观察结果一致。结果表明，如果在不考虑中耳压力的情况下使用耳声发射测试进行听力筛查，未均衡的中耳压力可能会增加假阳性失败的发生率。
