【摘要】 本文利用耳声发射分析仪ＣＥＬＥＳＴＡ５０３对２０名正常听力青年人进行了ＤＰＯＡＥ和ＴＥＯＡＥ测试，结果发现平均ＤＰＯＡＥ图中有两个反应高峰，分别位于１ｋＨｚ和６ｋＨｚ附近，两峰之间于３ｋＨｚ左右有一反应低谷。左右耳及性别差异对ＤＰＯＡＥ无显著性影响。ＤＰＯＡＥ的反应幅值随两个初始纯音强度的增加而升高，平均检测阈值在３０～４５ｄＢＳＰＬ之间。当初始音强度≤７０ｄＢＳＰＬ时，平均Ｉ／Ｏ函数曲线未见明显饱和现象。若采用不等强度的初始纯音（Ｌ１＝７０ｄＢＳＰＬ，Ｌ１－Ｌ２＝５ｄＢ）刺激，在中频部分（１．５～４ｋＨｚ）可获得较等强度初始纯音刺激时高的ＤＰＯＡＥ反应。由８０ｄＢｐｅＳＰＬ短声诱发的ＴＥＯＡＥ检出率为１００％，平均幅值４．１１±３．９９ｄＢＳＰＬ（ｘ±ｓ）。两种耳声发射之间有显著相关性。更多还原

【Abstract】 The basic properties of distortion product otoacoustic emissions(DPOAE) and transiently evoked otoacoustic emissions (TEOAE) were studied in 20 normal hearing youths by CELESTA 503 Cochlear Emissions Analyzer.The average DP gram illustrating the frequency response demonstrated two peaks of maximum amplitude at approximately 1 kHz and 6 kHz and a decline in DPOAE amplitude in midfrequencies (3 kHz).The two ears of a single subject or different gender tended to show similar DPOAE response.The amplitude of DPOAE gradually increased while two primary tones levels increased.The average detection threshold was between 30 and 45 dB SPL.When the primary tones levels were equal to or less than 70 dB SPL,the average DPOAE I/O functions did not exhibited obvious saturation.The higher response was found between 1.5 and 4kHz when using unequal primary tones levels(L 1-L 2=5 dB SPL).The click evoked TEOAE was detected in all subjects with the stimulus level of 80 dB peSPL and the average amplitude was 4.11±3.99 dB SPL.There was significant correlation between DPOAE and TEOAE.更多还原