【摘要】 利用耳动态分析仪ILO－92，对48例听力正常人（86耳）在4组不同原始刺激强度下（L1＝L2＝75dBSPL；L1＝L2＝65dBSPL；L1＝L2＝60dBSPL；L1＝65dBSPL，L2＝50dBSPL）进行畸变产物耳声发射（DPOAES）检查，结果发现平均DPOAEs图是双叶型轮廓：在1．5kHz和5kHz附近，2f1-f2DPOAEs存在两个高峰，在2．5～3kHz附近存在一个低谷，此图型结构无性别、耳别差异。DPOAEs反应的幅值随原始刺激强度增加而升高，平均幅值较原始刺激强度低55～65dBSPL。在4组不同原始刺激强度下，在1～6kHz范围内各个频率2f1－f2DPOAEs值存在显著性差异（P＜0．05）。更多还原

【Abstract】 With ILO-92 Otodynamics Analyzer, distortion product otoacoustic emissions (DPOAEs)at the 2 f1-f2 frequency were recorded from 86 normally hearing ears in response to four groups of different primary levels (L1 = L2 = 75 dB SPL; L1 = L2 = 65 dB SPL; L1 = L2 = 60 dB SPL ;L1 = 65 dB SPL,L2 = 50 dB SPL). The average DPOAEs-gram demonstrated a bilobed contour with two peaks at approximately 1. 5 kHz and 5 kHz and a "notch" between 2. 5 kHz and 3 kHz. Moreover,the contour of DPOAEs-gram had no obvious changes with sex,ear or primary stimulus levels differences. While the primary levels increased, the amplitude of DPOAEs gradua1ly increased,which was about 55~65 dB SPL below the primary levels. At each frequency from 1~6 kHz,statistical analysis showed that there existed significantly different DPOAEs level under four groups of different prirnary stimulus levels.更多还原