一个低频多频段压电MEMS声学传感器,灵感来自Ormia ochracea
Yi Liu1, Liye Zhao1, Xukai Ding1
1School of Instrument Science and Engineering, Southeast University, Nanjing 210096, China.
Micromachines
|April 26, 2025
概括
这项研究介绍了一种新的,紧的压电MEMS声学传感器,用于低频,多频段的声音检测. 灵感来自Ormia ochracea,它实现了增强的灵敏度和定向精度.
科学领域:
- 生物模拟学和传感器技术
- 材料科学与工程 材料科学与工程
- 声学和信号处理
背景情况:
- 的听觉系统启发了定向声学传感器.
- 现有的传感器往往缺乏低频能力和多频段功能.
- 高自身频率限制了当前传感器在低频环境中的适用性.
研究的目的:
- 开发一个低频,多频段的压电MEMS声学传感器.
- 克服现有的声学传感器在频率范围和设计方面的局限性.
- 为更广泛的应用增强定向声学传感.
主要方法:
- 一个紧的压电MEMS声学传感器的设计,具有改进的合结构.
- 纳入不对称的翼和合结构,以实现多频段响应.
- 利用化 (AlN) 作为压电材料和一个分支状电极设计.
主要成果:
- 传感器实现低频和多频段信号检测.
- 在2000Hz以下,有四个固有频率均分布.
- 在所有固有频率中对声源升高角度的一致的共弦响应.
结论:
- 拟议的传感器设计有效地实现了低频,多频段的声学检测.
- 传感器具有出色的方向灵敏度,适合各种声学应用.
- 使用AlN和优化的电极设计提高了性能和信号噪声比.
相关概念视频
01:13The Cochlea
The cochlea is a coiled structure in the inner ear that contains hair cells—the sensory receptors of the auditory system. Sound waves are transmitted to the cochlea by small bones attached to the eardrum called the ossicles, which vibrate the oval window that leads to the inner ear. This causes fluid in the chambers of the cochlea to move, vibrating the basilar membrane.
01:11The Auditory Ossicles
The auditory ossicles of the middle ear transmit sounds from the air as vibrations to the fluid-filled cochlea. The auditory ossicles consist of two malleus (hammer) bones, two incus (anvil) bones, and two stapes (stirrups), one on each side. These bones develop during the fetal stage and are the ones to ossify first. They are fully mature at birth and do not grow afterward.
The aptly named stapes look very much like a stirrup. The three ossicles are unique to mammals, and each plays a role in...
The aptly named stapes look very much like a stirrup. The three ossicles are unique to mammals, and each plays a role in...