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耳声发射(OAE)是一种产生于内耳耳蜗,经中耳传导释放到外耳道的能被检测到的微弱音频能量。OAE的发现证明了耳蜗不仅能被动接收声信号,也能主动释放音频能量,从而确立了耳蜗是一个双向换能器的学说。根据刺激声的有无,可将OAE分为自发耳声发射(SOAE)和诱发耳声发射(EOAE)两大类,而不同的刺激声也会诱发出不同的耳声发射。为了检测并分析多种耳声发射,本课题组开发了一个综合多功能的耳声发射检测系统。该系统使用NI公司的USB6211数据采集卡进行信号的A/D和D/A变换,运行于Labview平台,实现了对SOAE、SSOAE(同步SOAE)、TEOAE和DPOAE的检测,并能进行响应的对应OAE的信号分析。
Otoacoustic Emissions (OAE) is a faint audio energy that can be detected from the cochlea of the inner ear that is transmitted through the middle ear to the external auditory meatus. OAE’s findings demonstrate that the cochlea can not only passively receive acoustic signals but also actively release audio energy, establishing the doctrine that the cochlea is a bi-directional transducer. According to the presence or absence of stimuli, OAE can be divided into spontaneous otoacoustic emissions (SOAE) and induced otoacoustic emissions (EOAE) two categories, and different stimuli also induce different otoacoustic emissions. In order to detect and analyze a variety of otoacoustic emissions, our group developed an integrated multi-functional otoacoustic emission detection system. The system uses NI’s USB6211 data acquisition card for signal A / D and D / A conversion, running on the Labview platform to achieve the SOAE, SSOAE (synchronous SOAE), TEOAE and DPOAE detection, and can respond to the corresponding OAE signal analysis.