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基于光纤生物麦克风的紧型声源定位系统,具有扩展的定向范围.

Xin Liu1,2, Xinyu Hu1,2, Chen Cai1

  • 1State Key Laboratory of Transducer Technology, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100190, China.

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概括
此摘要是机器生成的。

本研究介绍了一种使用光纤麦克风的紧型生物声源声源定位 (SSL) 系统. 这种新型设备精确地检测低频声音方向在广的角度范围,克服传统系统的局限性.

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科学领域:

  • 声学 声学 在声学方面
  • 生物启发工程 生物启发工程
  • 微电机系统 (MEMS) 是指微电机系统.

背景情况:

  • 传统的声音源本地化 (SSL) 系统受到庞大的麦克风阵列的限制.
  • 灵感来自Ormia ochracea的迷你仿生SSL设备提供了尺寸优势,但在广角下与低频声音作斗争.

研究的目的:

  • 开发一个紧的低频SSL系统,具有扩展的定向范围.
  • 为了克服现有的微型生物式SSL设备的角度限制.

主要方法:

  • 使用了两个基于隔膜的生物微电机系统 (MEMS) 纤维光学麦克风在非共平面阵列中 (Φ44mm × 13mm).
  • 开发了一种算法来量化声源的亚齐穆塔角.
  • 进行模拟和实验以验证系统性能.

主要成果:

  • 该系统准确地确定了低于1kHz的声信号的方向,在-90°至90°的光线中.
  • 从 -70°到70°观察到线性反应.
  • 达到 ±7° 的角测量精度.

结论:

  • 开发的紧型SSL系统有效地将低频声音源定位在一个扩展的角度范围.
  • 这种生物启发的方法为微型声学传感应用提供了重大进步.