Journal
NEW JOURNAL OF PHYSICS
Volume 16, Issue -, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1367-2630/16/3/033026
Keywords
metamaterial; acoustic metamaterial; coherent perfect absorber; acoustic absorption
Categories
Funding
- State Key Program for Basic Research of China [2012CB921501]
- National Natural Science Foundation of China [11374224, 11104196, 11304215]
- Natural Science Foundation of Jiangsu Province [BK2011277, BK20130281]
- Program for New Century Excellent Talents in University (NCET)
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
Ask authors/readers for more resources
In this paper, we explore the possibility of achieving acoustic coherent perfect absorbers. Through numerical simulations in two dimensions, we demonstrate that the energy of coherent acoustic waves can be totally absorbed by a fluid absorber with specific complex mass density or bulk modulus. The robustness of such absorbing systems is investigated under small perturbations of the absorber parameters. We find that when the resonance order is the lowest and the size of the absorber is comparable to the wavelength in the background, the phenomenon of perfect absorption is most stable. When the wavelength inside both the background and the absorber is much larger than the size of the absorber, perfect absorption is possible when the mass density of the absorber approaches the negative value of the background mass density. Finally, we show that by using suitable dispersive acoustic metamaterials, broadband acoustic perfect absorption may be achieved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available