Cary Benjamin G, Zhang John Z, McHugh Christopher I, Kymissis Ioannis, Olson Elizabeth S, Nakajima Hideko Heidi, Lang Jeffrey H
Massachusetts Institute of Technology.
Harvard Medical School and Massachusetts Eye and Ear.
IEEE Sens J. 2021;2021. doi: 10.1109/sensors47087.2021.9639746. Epub 2021 Dec 17.
This paper presents an implantable microphone for sensing the displacement of the umbo, the end of the malleus where it attaches to the center tip of the cone-shaped tympanic membrane. The sensor comprises a piezoelectric polyvinylidene fluoride (PVDF) film with copper-nickel electrodes suspended across a brass cylinder. The cylinder is oriented so that the umbo pushes on the film center, causing a static and acoustically-driven dynamic film displacement. An amplifier filters the resulting piezoelectric charge to produce an output signal. The sensor enables the full implantation of assistive hearing devices, which can restore hearing without inhibiting the user's lifestyle, while enabling better sound localization in noisy environments.
本文介绍了一种可植入式麦克风,用于感测鼓膜脐部(锤骨附着于锥形鼓膜中心尖端的部位)的位移。该传感器由带有铜镍电极的压电聚偏二氟乙烯(PVDF)薄膜组成,薄膜横跨黄铜圆柱体悬挂。圆柱体的定向方式使得鼓膜脐部推动薄膜中心,从而引起薄膜的静态和声学驱动的动态位移。放大器对产生的压电电荷进行滤波以产生输出信号。该传感器能够实现辅助听力设备的完全植入,既可以恢复听力又不会限制用户的生活方式,同时还能在嘈杂环境中实现更好的声音定位。