Developing a Frequency‐selective Piezoelectric Acoustic Sensor Sensitive to the Audible Frequency Range of Rodents
Developing a Frequency‐selective Piezoelectric Acoustic Sensor Sensitive to the Audible Frequency Range of Rodents
复制标题
开发对啮齿动物可听频率范围敏感的频率选择性压电声学传感器
DOI：
10.1002/tee.23260
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发表时间：
2020
影响因子：
1
通讯作者：
Tateno Takashi
中科院分区：
文献类型：
--
作者：
Kuwano Takumi;Kaneta Hiroki;Nishikawa Jun;Satoh Kazuo;Murakami Shuichi;Tateno Takashi
我们已经开发了一种压电声传感器，可以响应啮齿类动物的可听频率范围，作为适合动物实验的小型听力假体系统的前端设备。所提出的压电换能器使用了一种仿生听力机制，该机制模拟了通过频率选择性压电悬臂梁阵列在啮齿动物的耳蜗膜和毛细胞中生物实现的带通滤波功能，该阵列将在未来的人类应用中用于刺激听神经元。首先，为了考察换能器的频率选择性和响应灵敏度，设计了一种多波束悬臂梁阵列结构的压电声换能器，并用数值计算方法分析了传感器-器件结构的机械共振特性。其次，在数值计算结果的基础上，提出了一种基于多悬臂梁阵列结构和压电材料的实用声传感器设计和构造方法。我们使用标准的微制造技术制造了传感器，并从声灵敏度的角度评估了它的压电性。最后，我们展望了包含所提出的声传感器的集成系统的未来应用，该系统可以与电刺激系统相结合，用作听觉假体系统，以补偿患有听力障碍和疾病的啮齿动物模型的听力损失。日本电气工程师学会。由威利期刊有限责任公司出版。
We have developed a piezoelectric acoustic sensor that responds to rodents' audible frequency range as a front‐end device for a small hearing prosthesis system appropriate for animal experiments. The proposed piezoelectric transducer uses a biomimetic hearing mechanism that mimics bandpass‐filtering functions realized biologically in the cochlear membranes and hair cells of rodents via a frequency‐selective piezoelectric cantilever beam array that will be used to stimulate auditory neurons in future applications to humans. First, to examine the frequency selectivity and response sensitivity, a piezoelectric acoustic transducer having a cantilever array structure with multiple beams were designed, and the mechanical resonance properties of the sensor‐device structure were analyzed using a numerical calculation method. Next, on the basis of the numerical results, we proposed a practical acoustic sensor design and sensor construction method using a multiple cantilever array structure and piezoelectric material. We built the sensor using standard microfabrication techniques and evaluated its piezoelectric properties in terms of sound sensitivity. Finally, we addressed future applications of an integrated system containing the proposed acoustic sensor, which could be combined with an electrical stimulation system and used as an auditory prosthesis system to compensate hearing losses in rodent models with hearing disorders and diseases. © 2020 Institute of Electrical Engineers of Japan. Published by Wiley Periodicals LLC.