Chin. Phys. Lett.  2009, Vol. 26 Issue (10): 106202    DOI: 10.1088/0256-307X/26/10/106202
CONDENSED MATTER: STRUCTURE, MECHANICAL AND THERMAL PROPERTIES |
A Wide Band Strong Acoustic Absorption in a Locally Network Anechoic Coating
JIANG Heng1,2, ZHANG Mi-Lin1, WANG Yu-Ren2, HU Yan-Ping2, LAN Ding2, WEI
Bing-Chen2
1Key Laboratory of Superlight Materials and Surface Technology (Ministry of Education), Harbin Engineering University, Harbin 1500012Key Laboratory of Microgravity Science, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190
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JIANG Heng, ZHANG Mi-Lin, WANG Yu-Ren et al  2009 Chin. Phys. Lett. 26 106202
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Abstract Composite materials with interpenetrating network structures usually exhibit unexpected merit due to the cooperative interaction. Locally resonant phononic crystals (LRPC) exhibit excellent sound attenuation performance based on a periodical arrangement of sound wave scatters. Inspired by the interpenetrating network structure and the LRPC concept, we develop a locally network anechoic coating (LNAC) that can achieve a wide band of underwater strong acoustic absorption. The experimental results show that the LNAC possesses an excellent underwater acoustic absorbing capacity in a wide frequency range. Moreover, in order to investigate the impact of the interpenetrating network structure, we fabricate a faultage structure sample and the network is disconnected by hard polyurethane (PU). The experimental comparison between the LNAC and the faultage structure sample shows that the interpenetrating network structure of the LNAC plays an important role in achieving a wide band strong acoustic absorption.
Keywords: 62.65.+k      81.05.Zx      43.30.+m     
Received: 10 June 2009      Published: 27 September 2009
PACS:  62.65.+k (Acoustical properties of solids)  
  81.05.Zx (New materials: theory, design, and fabrication)  
  43.30.+m (Underwater sound)  
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https://cpl.iphy.ac.cn/10.1088/0256-307X/26/10/106202       OR      https://cpl.iphy.ac.cn/Y2009/V26/I10/106202
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JIANG Heng
ZHANG Mi-Lin
WANG Yu-Ren
HU Yan-Ping
LAN Ding
WEIBing-Chen
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