首页 > 文献资料
-
耳声发射产生机制的新认识
耳声发射(OAEs)产生于内耳耳蜗.目前已被广泛地应用于听力诊断和耳蜗机制的研究中.然而迄今为止,对于耳声发射是如何从其产生位置传播至蜗底的问题,尚未完全研究清楚.
-
Although stimulus frequency otoacoustic emissions (SFOAEs) have been used as a non-invasive measure of cochlear mechanics, clinical and experimental application of SFOAEs has been limited by difficulties in accurately deriving quantitative information from sound pressure measured in the ear canal. In this study, a novel signal processing method for multicomponent analysis (MCA) was used to measure the amplitude and delay of the SFOAE. This report shows the delay-frequency distribution of the SFOAE measured from the human ear. A low level acoustical suppressor near the probe tone significantly suppressed the SFOAE, strongly indicating that the SFOAE was generated at characteristic frequency locations. Information derived from this method may reveal more details of cochlear mechanics in the human ear.
-
畸变产物耳声发射与纯音听阈间测试频率的对应性研究
纯音听阈测试和畸变产物耳声发射(distortion produst otoacoustic emissions,DPOAE)均为目前听力学领域常用的听功能检测手段.前者反映了被测试者的主观听力状况,后者客观的反映了耳蜗基底膜Cort's器外毛细胞的功能状态.DPOAE和纯音听阈测试均具有频率特性,但它们的测试频率之间有无相关性,它们的测试频率之间有无一一对应的关系,目前尚无人论及.为了探讨DPOAE测值与纯音听阈值之间的相关性,从理论上阐明DPOAE测试频率(f0或f2)与纯音听阈测试频率之间的对应关系,笔者特对20例(40耳)正常人和100例(179耳)蜗性聋患者行纯音听阈和DPOAE测试,对DPOAE测值与纯音听阈值之间的相关性进行了统计和分析,同时对f0与纯音听阈测试频率之间的对应关系进行了研究,现报告如下.
-
自发性耳声发射的研究进展
耳声发射(otoacoustic emission,OAE)是由耳蜗外毛细胞的主动活动产生的、可在外耳道被检测到的声能信号.根据诱发方式的不同,将记录到的OAE分为诱发性耳声发射(evoked otoacoustic emissions,EOAE)和自发性耳声发射(spontaneous otoacoustic emission,SOAE)两大类[1].