The Frequency Response of a Floating Piezoelectric Microphone for the Implantable Middle Ear Microphone
The Frequency Response of a Floating Piezoelectric Microphone for the Implantable Middle Ear Microphone
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植入式中耳麦克风的浮动压电麦克风的频率响应
DOI：
10.1002/lary.23618
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发表时间：
2013-06-01
期刊：
影响因子：
2.6
通讯作者：
Pan, Tie Zheng
中科院分区：
文献类型：
--
作者：
Gao, Na;Chen, Yong Zheng;Pan, Tie Zheng
目的/假设：一种由听小骨的声学振动驱动的压电式传感器，即浮动压电麦克风，是一种完全可植入的人工耳蜗术中麦克风的可能设计。研究设计：基础研究。方法：通过有限元建模和新鲜身体头部的体外测试，对浮动压电麦克风的频率响应进行分析。结果：浮动压电麦克风在听骨链的不同位置放置，并受到不同频率的纯音刺激。结果：浮动压电麦克风在听骨长过程中和锤部均能有效地拾取听骨链的振动，并有效地将其转换为电信号。在砧骨长过程中，平均灵敏度为-44.22dBRMSREF 1V，在锤部为-53.33dBRMSREF 1V，在鼓室中为-108.59 dBRMSREF 1V。结论：悬浮式压电式麦克风有望作为植入式中耳传声器用于人工耳蜗术。
Objectives/Hypothesis: A piezoelectric sensor, floating piezoelectric microphone, driven by acoustic vibration of the ossicles, is one possible design for a microphone for a totally implantable cochlear implant. The purpose of the article was to study the frequency response of the floating piezoelectric microphone and to identify the ideal feasible position in the ossicular chain.Study Design: Basic Research.Methods: The frequency response of the floating piezoelectric microphone was analyzed by finite-element modeling and in vitro testing of fresh cadaveric heads. The floating piezoelectric microphone, 5.0 mm in length and 1.5 mm by 1.2 mm in rectangular cross section, as a piezoelectric microphone, was placed at various locations on the ossicular chain and stimulated by pure tones of different frequencies.Results: The floating piezoelectric microphone can pick up the vibration of the ossicular chain and effectively convert it into the electronic signals effectively both in the long process of incus and in the malleus. The average sensitivity of the FPM is -44.22 dB rms ref 1V at 1000Hz in the long process of incus, -53.33 dB rms ref 1V at 1000Hz in the malleus, and -108.59 dB rms ref 1V at 1000Hz in the tympanic cavity.Conclusions: The floating piezoelectric microphone is expected to be used as an implantable middle ear microphone for the totally implantable cochlear implant.