摘要
畸变产物耳声发射（ＤＰＯＡＥ）测试中所采用的参数可以对测试结果有明显影响，为研究改变ＤＰＯＡＥ测试参数对反映耳蜗功能变化是否有影响，使１０只大白兔（１６耳）接触短时（３分钟）、中等强度（８２ｄＢＳＰＬ）的纯音暴露后发现，以等强原始音（Ｌ１＝Ｌ２）诱发的ＤＰＯＡＥ的幅度变化小于以差强原始音（Ｌ２＝Ｌ１－１２ｄＢ）诱发的ＤＰＯＡＥ（相差１０．１１ｄＢ），而其恢复过程也短于后者（相差１００．７１秒）。这种差别可能提示在ＤＰＯＡＥ的产生过程中有多个生理机制发挥作用。
Test parameter combinations are known to affect DPOAE measurement. The present study was attempted to find out if different test parameter combinations affect DPOAEs' utility in reflecting the change of cochlear function. Pure tones of moderate intensity (82 dB SPL) and short duration (3 min) were introduced into rabbit's ear canal to cause temporary change of cochlear mechanics, and the change of amplitude of 2f1 f2 DPOAE representing 10 kHz over 10 minutes after the exposure was monitored using equal and different primary level combinations. It was found that, under the same exposure condition, 2f1 f2 DPOAEs induced by primaries of different levels (L2=L1-12 dB) had showed more initial reduction in amplitude and slower recovery than that induced by primaries of equal levels (L1=L2). The difference may indicate that there are multiple physiological processes that contribute to the generation of 2f1 f2 DPOAE and that change of DPOAE test parameters may selectively reveal different DPOAE generating processes.
出处
《中华耳鼻咽喉科杂志》
CSCD
1997年第1期41-44,共4页
Chinese Journal of Otorhinolaryngology
