Affiliation:
1. School of Mechatronic Engineering, China University of Mining and Technology, Xuzhou, Jiangsu Province, China
2. Department of Otorhinolaryngology-Head and Neck Surgery, Shanghai Zhongshan Hospital Affiliated to Fudan University, Shanghai, China
Abstract
An active actuator of a middle-ear implant coupled to the round window membrane (RWM), which transmits vibration to the cochlea, has been used to compensate for hearing loss in patients. However, various factors affect the coupling condition between the actuator and the RWM, resulting in coupling leakage. In this study, a coupling impedance model of the human ear and the actuator was used to investigate the effect of inefficient coupling during reverse stimulation. First, the three-port circuit network model of the actuator was coupled with the acoustic impedance model of human ear reverse sound transmission. Meanwhile, the inefficient coupling impedance was estimated. Then, the effect of the actuator’s coupling on reverse stimulation was studied by comparing the reverse pressure transfer function. Furthermore, the inefficient coupling’s influence in the ear with middle-ear disorder was also investigated by simulating two typical forms of middle-ear disorder: otosclerosis and ossicular chain disarticulation. The results show that the change of the inefficient coupling impedance plays a significant role during reverse stimulation. Inefficient coupling of the actuator and the RWM deteriorates the cochlear response of reverse stimulation over the entire frequency range. Additionally, the coupling effect of the actuator does not change the influence tendency of middle-ear disorder on reverse stimulation’s performance, but changes the response amplitude of the reverse stimulation.
Funder
the Top-notch Academic Programs Project of Jiangsu Higher Education Institutions
the Shanghai Science and Technology Committee Fund
the Postgraduate Research & Practice Innovation Program of Jiangsu Province
the Priority Academic Program Development of Jiangsu Higher Education Institutions
the Assistance Program for Future Outstanding Talents of China University of Mining and Technology
National Natural Science Foundation of China
Subject
Mechanical Engineering,General Medicine
Cited by
5 articles.
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