声学超透镜的声音接收系统

Journal of International Maritime Safety, Environmental Affairs, and Shipping Pub Date : 2021-04-03 DOI:10.1080/25725084.2021.1923933

Sang-Hoon Kim, Byeongjik Ahn, Kyung-Min Park, Gung Su Lim, Mukunda P. Das

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引用次数: 2

摘要

摘要利用声学元透镜的方向性，设计了舰船声接收系统。采用由253个不同半径的亚克力管组成的二维圆盘形声学元透镜或吕讷堡声学透镜来控制折射率。镜片直径180厘米，厚度20厘米。8个麦克风安装在镜头的边缘，因为镜头将输入信号聚焦到镜头另一侧的边缘。以某大学训练船的喇叭为发射器，装在小船上作为接收器，在海上测试了该透镜的声接收能力。两者都在300 ~ 700米之间以20 ~ 40公里/小时的速度移动。镜头可以聚焦识别频率在300到900赫兹之间的输入声音的方向。缩写IMO:国际海事组织所有:卢讷堡声透镜SRS:声音接收系统

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Sound reception system by an acoustic meta-lens

ABSTRACT Applying the directionality of an acoustic meta-lens, a sound reception system for ships is designed. A two-dimensional disk shape acoustic meta-lens or an acoustic Luneburg lens made of 253 acrylic pipes of different radii which control the refractive index is used. The lens has the diameter of 180 cm and the thickness of 20 cm. Eight microphones were installed around the edges of the lens because the lens focuses the input signal into the edge of the other side of the lens. The sound reception ability of the lens was tested on the sea using the horn of a university training ship as an emitter and the lens loaded on a small boat as a receiver. Both are moving at 20 ~ 40 km/h at a distance between 300 ~ 700 m. The lens could focus to recognize the direction of the input sound in the frequency range between 300 and 900 Hz. ABBREVIATIONS IMO: International Maritime Organization ALL: Acoustic Luneburg Lens SRS: Sound Reception System

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来源期刊

Journal of International Maritime Safety, Environmental Affairs, and Shipping

CiteScore

4.90

自引率

0.00%

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