ENT Department, Ghent University, Belgium.
Int J Audiol. 2010 Feb;49(2):99-109. doi: 10.3109/14992020903300431.
Knowledge regarding the variability of transient-evoked otoacoustic emissions (TEOAEs) and distortion product otoacoustic emissions (DPOAEs) is essential in clinical settings and improves their utility in monitoring hearing status over time. In the current study, TEOAEs and DPOAEs were measured with commercially available OAE-equipment in 56 normally-hearing ears during three sessions. Reliability was analysed for the retest measurement without probe-refitting, the immediate retest measurement with probe-refitting, and retest measurements after one hour and one week. The highest reliability was obtained in the retest measurement without probe-refitting, and decreased with increasing time-interval between measurements. For TEOAEs, the lowest reliability was seen at half-octave frequency bands 1.0 and 1.4 kHz; whereas for DPOAEs half-octave frequency band 8.0 kHz had also poor reliability. Higher primary tone level combination for DPOAEs yielded to a better reliability of DPOAE amplitudes. External environmental noise seemed to be the dominating noise source in normal-hearing subjects, decreasing the reliability of emission amplitudes especially in the low-frequency region.
了解瞬态诱发耳声发射（TEOAEs）和畸变产物耳声发射（DPOAEs）的可变性对于临床环境至关重要，这可以提高它们在随时间监测听力状态方面的效用。在本研究中，使用市售的 OAE 设备在三个时段内对 56 只正常听力耳进行了 TEOAEs 和 DPOAEs 测量。对不重新探头适配的复测测量、有探头适配的即时复测测量以及一小时和一周后的复测测量进行了可靠性分析。不重新探头适配的复测测量具有最高的可靠性，而随着测量之间的时间间隔增加，可靠性会降低。对于 TEOAEs，在半倍频带 1.0 和 1.4 kHz 处观察到最低的可靠性；而对于 DPOAEs，半倍频带 8.0 kHz 的可靠性也较差。对于 DPOAEs，较高的主音级组合可获得更好的 DPOAE 幅度可靠性。外部环境噪声似乎是正常听力受试者的主要噪声源，特别是在低频区域，降低了发射幅度的可靠性。
