Physical modeling and validation of porpoises' directional emission via hybrid metamaterials

View/ Open
Date
2019-07-22Author
Dong, Erqian
Concept link
Zhang, Yu
Concept link
Song, Zhongchang
Concept link
Zhang, Tianye
Concept link
Cai, Chen
Concept link
Fang, Nicholas X.
Concept link
Metadata
Show full item recordCitable URI
https://hdl.handle.net/1912/25543As published
https://doi.org/10.1093/nsr/nwz085DOI
10.1093/nsr/nwz085Abstract
In wave physics and engineering, directional emission sets a fundamental limitation on conventional simple sources as their sizes should be sufficiently larger than their wavelength. Artificial metamaterial and animal biosonar both show potential in overcoming this limitation. Existing metamaterials arranged in periodic microstructures face great challenges in realizing complex and multiphase biosonar structures. Here, we proposed a physical directional emission model to bridge the gap between porpoises’ biosonar and artificial metamaterial. Inspired by the anatomical and physical properties of the porpoise's biosonar transmission system, we fabricated a hybrid metamaterial system composed of multiple composite structures. We validated that the hybrid metamaterial significantly increased directivity and main lobe energy over a broad bandwidth both numerically and experimentally. The device displayed efficiency in detecting underwater target and suppressing false target jamming. The metamaterial-based physical model may be helpful to achieve the physical mechanisms of porpoise biosonar detection and has diverse applications in underwater acoustic sensing, ultrasound scanning, and medical ultrasonography.
Description
© The Author(s), 2019. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Dong, E., Zhang, Y., Song, Z., Zhang, T., Cai, C., & Fang, N. X. Physical modeling and validation of porpoises' directional emission via hybrid metamaterials. National Science Review, 6(5), (2019): 921-928, doi:10.1093/nsr/nwz085.
Collections
Suggested Citation
Dong, E., Zhang, Y., Song, Z., Zhang, T., Cai, C., & Fang, N. X. (2019). Physical modeling and validation of porpoises' directional emission via hybrid metamaterials. National Science Review, 6(5), 921-928.The following license files are associated with this item:
Related items
Showing items related by title, author, creator and subject.
-
Propagation of narrow-band-high-frequency clicks : measured and modeled transmission loss of porpoise-like clicks in porpoise habitats
DeRuiter, Stacy L.; Hansen, Michael; Koopman, Heather N.; Westgate, Andrew J.; Tyack, Peter L.; Madsen, Peter T. (Acoustical Society of America, 2010-01)Estimating the range at which harbor porpoises can detect prey items and environmental objects is integral to understanding their biosonar. Understanding the ranges at which they can use echolocation to detect and avoid ... -
Investigation on acoustic reception pathways in finless porpoise (Neophocaena asiaorientalis sunameri) with insight into an alternative pathway
Song, Zhongchang; Zhang, Yu; Mooney, T. Aran; Wang, Xianyan; Smith, Adam B.; Xu, Xiaohui (2018-10)Sound transmission and reception are both vital components to odontocete echolocation and daily life. Here, we combine computed tomography (CT) scanning and Finite Element Modeling to investigate the acoustic propagation ... -
Biosonar signal propagation in the harbor porpoise's (Phocoena phocoena) head : the role of various structures in the formation of the vertical beam
Wei, Chong; Au, Whitlow W. L.; Ketten, Darlene R.; Song, Zhongchang; Zhang, Yu (Acoustical Society of America, 2017-06-07)Harbor porpoises (Phocoena phocoena) use narrow band echolocation signals for detecting and locating prey and for spatial orientation. In this study, acoustic impedance values of tissues in the porpoise's head were calculated ...