Journal
CHINESE PHYSICS LETTERS
Volume 32, Issue 1, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0256-307X/32/1/014302
Keywords
-
Categories
Funding
- National Basic Research Program of China [2011CB610300]
- National Natural Science Foundation of China [11102148, 11321062]
- Fundamental Research Funds for Central Universities of China
Ask authors/readers for more resources
We report an extraordinary sound absorption enhancement in low and intermediate frequencies achieved by a thin multi-slit hybrid structure formed by incorporating micrometer scale micro-slits into a sub-millimeter scale meso-slit matrix. Theoretical and numerical results reveal that this exotic phenomenon is attributed to the noticeable velocity and temperature gradients induced at the junctures of the micro-and meso-slits, which cause significant loss of sound energy as a result of viscous and thermal effects. It is demonstrated that the proposed thin multi-slit hybrid structure with micro-scale configuration is capable of controling low frequency noise with large wavelength, which is attractive for applications where the size and weight of a sound absorber are restricted.
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