豚鼠畸变产物微音器电位与畸变产物耳声发射的相关性研究

Correlation Between DPOAE and DPCM in Guinea Pigs

为探讨畸变产物微音电位(DPCM)是否畸变产物耳声发射(DROAE)引发,将豚鼠的DPOAE和DPCM同时叠加,发现在较高强度的声刺激下(f_0=1006 Hz,f_0=2011 Hz,f_0=4033 Hz),DPCM叠加结果与DPOAE各峰有一一对应的关系,CM的2f_1-f_2峰相对值(与f_1峰比值)比DPOAE的2f_1-f_2要小得多.较低声强声刺激时(f_0=1006 Hz<50 dB,f_0=2011 Hz<60 dB,f_0=4033 Hz<60 dB)只有DROAE而无DPCM与之对应,提示DROAE不可能由DPCM诱发.

In order to in vestigate the relationship between DPOAE and DPCM in guinea pigs, the simultaneous average of the DPOAE and DPCM was used. The result showed that in the high stimulative intense both showed peaks in the same frequent region, but in the low intense( < 50 dB) only DPOAE' s peaks existed. The result suggests that the DPOAE is not elicited by correlated DPCM.