Volume 111, Number 6, September 2015
|Number of page(s)||5|
|Section||Electromagnetism, Optics, Acoustics, Heat Transfer, Classical Mechanics, and Fluid Dynamics|
|Published online||06 October 2015|
Broadband diffuse reflections of sound by metasurface with random phase response
1 Key Laboratory of Modern Acoustics, MOE, Institute of Acoustics, Department of Physics, Nanjing University Nanjing 210093, PRC
2 Collaborative Innovation Center of Advanced Microstructures, Nanjing University - Nanjing 210093, PRC
Received: 30 May 2015
Accepted: 11 September 2015
We have designed an ultrathin planar structure capable of generating diffuse reflections within a broadband. By introducing randomly distributed gradients along the interface, the proposed structure can scatter the incident acoustic waves into all directions and virtually suppress the scattered lobes that will otherwise be remarkable for a planar surface. A practical implementation by labryinthine-like metamaterial with designed phase shift profile is demontrated. The numerical results show that our designed planar surface could be used to mimic a rugged surface as expected. We envision our designed structure to exhibit potentials in applications such as room acoustics and acoustic stealth.
PACS: 43.20.El – Reflection, refraction, diffraction of acoustic waves / 43.20.+g – General linear acoustics / 43.40.+s – Structural acoustics and vibration
© EPLA, 2015
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.