Abstract
This paper shows an influence of a transducer of a middle ear implant on ear dynamics on the basis of the multi-degree-of-freedom biomechanical system. Results of numerical simulations of an ear model with implant are compared with those of the healthy middle ear. Two variants of damping are analysed. The first one typical for a normal healthy middle ear structure and the second one describes pathological properties of the human ear. Moreover, the behaviour of the transducer under various external excitations is investigated. For some set of parameters, the middle ear with the implant behaves regularly but sometimes even chaotically in case of strong excitation.
Highlights
E latter can be healed by a cochlear implant in case of profound hearing loss, but most mild to moderate sensorineural hearing losses are still compensated by traditional hearing aids
Conventional hearing aids have several inherent disadvantages, such as sound distortion, limited amplification, noise and ringing, discomfort, and cosmetic appearance [1]. erefore, in recent years, new solutions of active middle ear implants have been used in medical practice as an alternative to the conventional treatment method. ese devices are known as implantable middle ear hearing devices (IMEHDs) and can be used in case of sensorineural hearing loss and sometimes in different structural configurations in conductive hearing loss
A typical IMEHD consists of three parts (Figure 1): the microphone, the signal processing, and the vibrating output transducer called as the floating mass transducer (FMT)
Summary
E latter can be healed by a cochlear implant in case of profound hearing loss, but most mild to moderate sensorineural hearing losses are still compensated by traditional hearing aids. Placing an implant to the ear structure, dynamics of the middle ear can change because of additional mass and nonlinear properties of a transducer.
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