纯音听阈正常飞行员诱发性耳声发射检测分析

Measurement of evoked otoacoustic emissions in pilots with normal pure tone hearing thresholds

目的 对纯音听阈正常的飞行员进行诱发性耳声发射检测,早期发现飞行员的噪声性听力损害。 方法 采用Capella耳声发射分析仪对纯音听阈正常的飞行员(30 例,60 耳)及健康对照者(15例,30耳)分别进行诱发性耳声发射(瞬态诱发耳声发射和畸变产物诱发耳声发射)检测,并记录结果进行统计学分析。 结果 与对照组相比,飞行员组的畸变产物诱发耳声发射的高频幅值、瞬态诱发耳声发射的反应波信噪比、波形重复率、频带信噪比和重复率均降低(P< 0 05 或P<0 01)。 结论 纯音听阈正常的飞行员可能存在着早期听觉损害,对飞行员应当重视听力动态监测,以加强早期防护,诱发性耳声发射是行之有效的方法。

Objective To detect the early hearing impairment induced by noise in pilots. Methods Thirty pilots with normal pure tone hearing thresholds served as subjects and 15 normal volunteers as controls. Transient evoked otoacoustic emission (TEOAE) and distortion-product evoked otoacoustic emission (DPOAE) were recorded with Capella acoustic emission machine, and the results of 2 groups were compared and analyzed. Results As compared with those of controls, the DPOAE amplitudes at high frequencies, the wave signal noise ratio (SNR), wave reproducibility, band SNR and band reproducibility of TEOAE were significantly lowered. Conclusions It is suggested that early hearing impairment may exist in pilots with normal pure tone hearing thresholds. TEOAE and DPOAE may be used to detect the early hearing impairment dynamically in pilots.