In this paper, the design of MEMS based implantable device is proposed which does not require electrical power for the device functioning. The device is designed to mimic the human ossicular system and is aimed at restoring hearing by implanting it in patients with a damaged or surgically removed ossicular chain. The model involves multiple micro-beams considering the low cost and easy fabrication processes needed to realize the device. The solid mechanical and acoustic analyses for the MEMS based ossicular system are performed in COMSOL Multiphysics. Here, the device specifications are evaluated for the hearing frequency range 20Hz–20000Hz. The device delivers the maximum pressure gain of 10 dB is obtained at 5500 Hz. Further, the total displacement of 14*10−6 mm is obtained at the oval window for sound pressure level of 90 dB, using this device. The maximum weight of the whole system is approximately 33.7 mg and is in relevance with the human ossicular system. The failure analysis is also done to assess the device’s strength at extreme sound pressure of 200 Pa i.e., when nearby jet airplane taking off. The results shown here demonstrate the potential of the MEMS actuators for application to middle-ear audio-prosthesis systems without power supply requirements.
Novel Low Cost Powerless MEMS Based Ossicular System
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Ganesan, AV, Ramanujam Ramdoss, VD, Kishore Kumar, D, & Swaminathan, S. "Novel Low Cost Powerless MEMS Based Ossicular System." Proceedings of the ASME 2013 International Mechanical Engineering Congress and Exposition. Volume 15: Safety, Reliability and Risk; Virtual Podium (Posters). San Diego, California, USA. November 15–21, 2013. V015T16A024. ASME. https://doi.org/10.1115/IMECE2013-66341
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