Institute of Physiology and Pathology of Hearing, Warsaw, Poland.
World Hearing Center, Kajetany, Nadarzyn, Poland.
Int J Audiol. 2024 May;63(5):293-299. doi: 10.1080/14992027.2023.2207116. Epub 2023 May 2.
The purpose of this pilot study was to evaluate the magnitude of the medial olivocochlear reflex (MOCR) estimated by the reduction in tone-burst evoked otoacoustic emissions (TBOAEs) measured at three levels and at three frequencies in response to fixed contralateral white noise. Results were compared with commonly used click-evoked otoacoustic emissions (CEOAEs).
TBOAEs and CEOAEs, with and without contralateral 60 dB SPL white noise, were measured in response to stimulation at 55, 65, and 75 dB peSPL. In each subject, the set of measurements was performed twice. Of particular interest were the MOCR and its repeatability.
15 normally hearing persons (13 women, average age 32.3 years, SD = 8.1).
For both CEOAE and TBOAEs, the reliability of the MOCR was much better for broadband measurements than for half-octave-band filtered estimates. At the same time, the reliability of MOCR in half-octave bands was higher for TBOAEs than for CEOAEs, especially at 2 and 4 kHz.
For general applications where broadband MOCR is of interest, the highest magnitude and reliability is provided by CEOAEs. However, TBOAEs may be better if a particular frequency band is of interest.
本初步研究旨在评估在固定对侧白噪声刺激下，通过测量三个频率和三个强度的声导纳瞬态耳声发射（TBOAEs）来评估内侧橄榄耳蜗反射（MOCR）的幅度。结果与常用的click-evoked otoacoustic emissions（CEOAEs）进行了比较。
在 55、65 和 75 dB peSPL 的刺激下，测量了有和没有对侧 60 dB SPL 白噪声的 TBOAEs 和 CEOAEs。在每个受试者中，进行了两次测量。特别感兴趣的是 MOCR 及其可重复性。
15 名听力正常的人（13 名女性，平均年龄 32.3 岁，标准差=8.1）。
对于 CEOAE 和 TBOAEs，宽带测量的 MOCR 可靠性远高于半倍频带滤波估计的可靠性。同时，对于 TBOAEs 而言，半倍频带 MOCR 的可靠性高于 CEOAEs，特别是在 2 和 4 kHz 时。
对于一般应用中感兴趣的宽带 MOCR，最高的幅度和可靠性由 CEOAEs 提供。然而，如果感兴趣的是特定的频带，则 TBOAEs 可能更好。
