猫头鹰静音飞行机理研究.pdfVIP

Applied Physics 应用物理, 2015, 5(11), 137-146 Published Online November 2015 in Hans. /journal/app /10.12677/app.2015.511019 Study on Mechanism of Silent Flight of Owls 1 2 3 4 Deyi Kong , Aiping Liang , Jinkui Chu , Tao Mei 1 Institute of Intelligent Machines, Chinese Academy of Sciences, Hefei Anhui 2 Institute of Zoology, Chinese Academy of Sciences, Beijing 3 Dalian University of Technology, Dalian Liaoning 4 China Security Surveillance Technology, Inc., Shenzhen Guangdong th th th Received: Nov. 5 , 2015; accepted: Nov. 19 , 2015; published: Nov. 24 , 2015 Copyright © 2015 by authors and Hans Publishers Inc. This work is licensed under the Creative Commons Attribution International License (CC BY). /licenses/by/4.0/ Abstract The silent flight of owls has long fascinated ornithologists, acoustic specialists, and even military experts; no other birds fly with such distinct advantages. In this work, the flight noise of a bubo bubo (a kind of large owl) was recorded, and followed by a comprehensive study on the mechan- ism of the silent flight, including research on the wing profile and its aerodynamic performance and acoustic property, the morphology of the feathers and its mechanical characteristics, as well as the microscopic structure of the skin and its sound absorption performance. It is concluded that the unique ability of silent flight of owls attributes to the combination of multiple noise reduction factors, sorted as sound suppression and sound absorption, which has piqued the interest of bio- mimetic research for noise control. Keywords Owl, Silent Flight, Biomimetic Noise Reduc