Wada H, Kobayashi T, Suetake M, Tachizaki H
Department of Mechanical Engineering, Tohoku University, Sendai, Japan.
Audiology. 1989;28(3):127-34. doi: 10.3109/00206098909081618.
A measuring apparatus was developed; its probe tip, which exhibits flat frequency characteristics, enables this apparatus to measure the absolute sound pressure and absolute phase variations versus both sweeping frequency and external auditory canal pressure. Although it is difficult to diagnose ossicular chain separation and fixation from the commonly used tympanograms with a low probe tone frequency (e.g.f = 220 Hz), the results obtained with this apparatus enable one to clearly distinguish patients with ossicular chain disorders from normal subjects. Therefore, it seems to be highly useful in the clinical diagnosis of ossicular chain disorders.
开发了一种测量装置；其探头尖端具有平坦的频率特性，使该装置能够测量相对于扫频和外耳道压力的绝对声压和绝对相位变化。虽然用常用的低频探头音鼓室图（例如f = 220Hz）很难诊断听骨链分离和固定，但该装置获得的结果能够使人们清楚地区分听骨链疾病患者和正常受试者。因此，它在听骨链疾病的临床诊断中似乎非常有用。
