Development of Diagnostic Apparatus for Ear Disease

耳声发射(OAEs)被认为起源于外毛细胞的运动，并被认为是以退行性的方式通过中耳传递到外耳道。本文首先应用自行研制的扫频阻抗测试仪和三种耳声发射测量仪，对受试者和豚鼠的中耳动态特性和不同类型的耳声发射进行了测量，从不同角度探讨了中耳声学特性与中耳动态特性的关系。在此基础上，确定了中耳和内耳疾病诊断仪的测量方法。即在外耳道与鼓室之间的压差最小时测量短纯音诱发的耳声发射，由于该测量方法的国际专利将在4年后到期，上述仪器的研制将随之展开。

Otoacoustic emissions (OAEs) are believed to originate from outer hair cell movement and are considered to be transmitted to the external auditory meatus through the middle ear in a retrograte fashion. Therefore, the effect of the middle ear on OAEs seems to be large.In this paper, firstly, applying our developed sweep frequency impedance meter (SFI) and three OAEs measuring apparatuses, middle ear dynamic characteristics and different sorts of OAEs of human subjects and guinea pigs were measured, and an attempt was made to examine the relationship between OAEs and middle ear dynamic characteristics from various aspects.Then, measurement method of an apparatus for diagnosing both middle and inner ear diseases is determined, i.e.tone-burst evoked OAEs are measured when the pressure difference between the external auditory meatus and the tympanic cavity is the smallest.As the international patent of the measuring method of OAEs will be expired in 4 years, the development of the apparatus mentioned above will start afterwards.