Optimal sound-absorbing structures
By Min Yang, Shuyu Chen, Caixing Fu, P. Sheng. 2016
443 citations recorded by the source corpus.
The causal nature of the acoustic response dictates an inequality that relates the two most important aspects of sound absorption: the absorption spectrum and the sample thickness. We use the causality constraint to delineate what is ultimately possible for sound absorbing structures, and denote those which can attain near-equality for the causality constraint to be “optimal.” Anchored by the causality relation, a design strategy is presented for realizing structures with target-set absorption spectra and a sample thickness close to the minimum value as dictated by causality. By using this approach, we have realized a 10.86 cm-thick structure that exhibits a broadband, near-perfect flat absorption spectrum starting at around 400 Hz, while the minimum sample thickness from the causality constraint is 10.36 cm. To illustrate the versatility of the approach, two additional optimal structures with different target absorption spectra are presented. This “absorption by design” strategy would enable the tailoring of customized solutions to difficult room acoustic and noise remediation problems.
Subfields: Aerospace Engineering, Biomedical Engineering, Speech and Hearing
View Paper: https://www.semanticscholar.org/paper/ac62935c1e127f59a41fa2299bd91b30cdb44fe0
How researchers see this paper
The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.
In Aerospace Engineering
In Biomedical Engineering
Citations in the corpus
- Extreme low-frequency ultrathin acoustic absorbing metasurface (2019, methodology): “idirectional perfect acoustic absorber (with the thickness of ~1/88 of the operating wavelength) using the mechanism of slowing sound and critical coupling. For the broadband performance, Yang et al. [25] proposed optimal soundabsorbing structures based on multiple resonant tubes to achieve highly e”