新生儿畸变产物耳声发射测试

用ＧＳＩ６０ＤＰＯＡＥ仪对２０例（４０耳）新生儿进行畸变产物耳声发射（ＤＯＰＡＥ）测试。结果显示，在ｆ１≤１ｋＨｚ时ＤＯＰＡＥ检出率很低，而当ｆ１位于１．４￣４．０ｋＨｚ时，检出率大于９０％；低频率的ＤＯＰＡＥ辐值较低，在ｆ１位于１．４￣４．０ｋＨｚ范围内幅值较高。提示新生儿低频段ＤＰ易受噪声、刺激声强度、受试者的自身代谢活动、中耳功能及中耳对耳蜗反应的传输功能的影响。因此，在用ＤＰ进行新生儿听力

Distortion product otoacoustic emissions on neonates

Distortion product otoacoustic emissions (DPOAE) is evoked by two pure-tones (f1,f2 ). It is a kind of reflex of cochlea. In order to know the effect of different elements on DPOAE of neonates, we used GSI 60 DPOAE to detect the DPOAE of 40 ears of 20 neonates. The results showed that when f1 was below 1 000 Hz,the incidence of DPOAE was very low. When the f1 was between 1 400 and 4 000 Hz,the incidence of detectability was more than 90%. The amplitude of DPOAE was low within lower frequence area,while f1 was between 1 000 and 4 000 Hz,the ampli-tude was higher. We consider that the DPOAE of neonates were easily affected by noise,stimulus intensity, the function of middle ear, etc. We must pay attention to these elements when we use DPOAE to test hearing funtion of neonates.