완전 이식형 인공중이용 마이크로폰 위치 결정을 위한 물리적 귀 모델에서의 음향 반향 현성 분석

Generally, implantable microphone has been implanted in the temporal bone for implantable middle ear hearing devices (IMEHDs). In this case, the microphones membrane can be damaged and can be generated biological noise. In order to overcome the these problems, the location of implanted microphone should be changed. As an alternative, the microphone can be implanted in the external auditory canal or in the .pinna. However, the sound emission can be produced because of vibration transducer toward reverse direction from the tympanic membrane to the external auditory canal. In this paper, an amount of the emitted sound is measured using a probe microphone as the changing the position of microphone in the external auditory canal or in the pinna of a physical ear model, which is similar to acoustical and vibratory properties of the human ear. According to analysis of the measurements, the proper location of the microphone can be estimated which can minimize emitted sound.