前庭水管为一位于耳囊内的骨性通道,由前庭内壁延伸到岩锥的后面,内淋巴管由此穿过。中耳的共振频率由中耳传导系统的质量和硬度、鼓室腔的容积和气压、中耳肌的张力及耳蜗的机械导抗所决定。如果前庭水管扩大引起内淋巴管和内淋巴囊的扩大,并因此 The vestibular aqueduct is a bony passage within the ear canal that extends from the inner vestibular wall to the back of the rock cone, through which the lymphatic vessels pass. The resonance frequency of the middle ear is determined by the mass and stiffness of the middle ear conduction system, the volume and pressure of the tympanic cavity, the tension of the middle ear muscle, and the mechanical conductivity of the cochlea. If the vestibular aqueduct enlargement causes the extension of the lymphatic vessels and endolymphatic sac, and therefore