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Ultra-sparse near-perfect sound absorbers.

Publication ,  Journal Article
Ji, J; Li, J; Cummer, SA; Jing, Y
Published in: JASA express letters
March 2023

There is a trade-off between the sparseness of an absorber array and its sound absorption imposed by wave physics. Here, near-perfect absorption (99% absorption) is demonstrated when the spatial period of monopole-dipole resonators is close to one working wavelength (95% of the wavelength). The condition for perfect absorption is to render degenerate monopole-dipole resonators critically coupled. Frequency domain simulations, eigenfrequency simulations, and the coupled mode theory are utilized to demonstrate the acoustic performances and the underlying physics. The sparse-resonator-based sound absorber could greatly benefit noise control with air flow and this study could also have implications for electromagnetic wave absorbers.

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Published In

JASA express letters

DOI

EISSN

2691-1191

ISSN

2691-1191

Publication Date

March 2023

Volume

3

Issue

3

Start / End Page

034001
 

Citation

APA
Chicago
ICMJE
MLA
NLM
Ji, J., Li, J., Cummer, S. A., & Jing, Y. (2023). Ultra-sparse near-perfect sound absorbers. JASA Express Letters, 3(3), 034001. https://doi.org/10.1121/10.0017520
Ji, Jun, Junfei Li, Steven A. Cummer, and Yun Jing. “Ultra-sparse near-perfect sound absorbers.JASA Express Letters 3, no. 3 (March 2023): 034001. https://doi.org/10.1121/10.0017520.
Ji J, Li J, Cummer SA, Jing Y. Ultra-sparse near-perfect sound absorbers. JASA express letters. 2023 Mar;3(3):034001.
Ji, Jun, et al. “Ultra-sparse near-perfect sound absorbers.JASA Express Letters, vol. 3, no. 3, Mar. 2023, p. 034001. Epmc, doi:10.1121/10.0017520.
Ji J, Li J, Cummer SA, Jing Y. Ultra-sparse near-perfect sound absorbers. JASA express letters. 2023 Mar;3(3):034001.

Published In

JASA express letters

DOI

EISSN

2691-1191

ISSN

2691-1191

Publication Date

March 2023

Volume

3

Issue

3

Start / End Page

034001