40名听力正常潜艇艇员畸变产物耳声发射分析(论著)

DPOAE in 40 submariners with normal pure tone audiogram

目的：了解潜艇员听功能状态与畸变产物耳声发射（ＤＰＯＡＥ）的关系。方法：听力正常艇员４０名（８０耳），用ＧＳＩ—６０耳声发射测试仪行听力测试，刺激声强度Ｌ１＝Ｌ２＝７０ｄＢ（ＳＰＬ），ｆ２／ｆ１＝１．２，选择２ｆ１－ｆ２点ＤＰＯＡＥ值共取８个点的频率对其进行幅值测试。结果：ＤＰＯＡＥ的检出率，１、２、８点分别为９３．７５％、９７．５０％和８０．００％，余各点为１００．００％；ＤＰＯＡＥ幅值在４０００Ｈｚ以上较低。结论：潜艇作业人员虽然从纯音测听检测中并未表现出听力损害，但在ＤＰＯＡＥ检测结果中已看出有高频听力损失。在诊断早期耳蜗功能障碍时。

Aim: To observe the changes of distortion product otoacoustic emissions(DPOAE) in 40 submariners with normal pure tone audiogram. Methods: The DPOAE was recorded with GSI-60 DPOAE system. The submariners had all worked in a noise environment for at least 1 year. The stimulation sound intensity level was L1=L2=70 dB, the f2/f1 ratio was 12, and the DPOAE amplitudes of 8 frequency points were collected. Results: The DPOAE recorded were 9375%,9750%,8000% at Nos. 1,2,8 frequency points respectively and 100% at other 5 frequency points. The DPOAE amplitudes over 4 000 Hz were decreased as compared with that of normal persons. Conclusion: DPOAE can expose high frequency hearing loss of the submariner with normal pure tone audiogram, which indicated DPOAE is more sensitive in detecting early cochlear damage than pure tone audiometry.