Experimental Observation of Reversed Doppler Effects in Acoustic Metamaterials

Autor:	Zhai, Shilong, Zhao, Xiaopeng, Liu, Song, Luo, Chunrong
Rok vydání:	2015
Předmět:	Condensed Matter - Mesoscale and Nanoscale Physics Condensed Matter - Materials Science
Druh dokumentu:	Working Paper
Popis:	This paper reports an experimental observation of broadband reversed Doppler effects using an acoustic metamaterial with seven flute-like double-meta-molecule clusters. Simulations and experiments verify that this locally resonant acoustic metamaterial with simultaneous negative elastic modulus and mass density can realize negative refraction in a broad frequency range. The constructed metamaterial exhibits broadband reversed Doppler effects. The frequency shift increases continuously as the frequency increases. The assembling of double-meta-molecule clusters introduces a new direction in designing double-negative acoustic metamaterials in an arbitrarily broad frequency range and other various applications. Comment: 19 pages, 4 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1505.05871 Zobrazit plný text záznamu View this record from Arxiv