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Ultra-low and ultra-broad-band nonlinear acoustic metamaterials
Open accessAbstract
Linear acoustic metamaterials (LAMs) are widely used to manipulate sound; however, it is challenging to obtain bandgaps with a generalized width (ratio of the bandgap width to its start frequency) >1 through linear mechanisms. Here we adopt both theoretical and experimental approaches to describe the nonlinear chaotic mechanism in both one-dimensional (1D) and two-dimensional (2D) nonlinear acoustic metamaterials (NAMs). This mechanism enables NAMs to reduce wave transmissions by as much as 20–40 dB in an ultra-low and ultra-broad band that consists of bandgaps and chaotic bands. With subwavelength cells, the generalized width reaches 21 in a 1D NAM and it goes up to 39 in a 2D NAM, which overcomes the bandwidth limit for wave suppression in current LAMs. This work enables further progress in elucidating the dynamics of NAMs and opens new avenues in double-ultra acoustic manipulation.
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Metadata
- Authors
- Fang, X., Wen, J., Bonello, B., Yin, J., & Yu, D.
- Venue
- Nature Communications
- Published
- 2017-11-03
- Volume
- 8
- Issue
- 1
- Pages
- 1288-1288
- ISSN
- 2041-1723 (ISSN-L)
- OpenAlex
- W2765176628
- Cited by
- 331
- References
- 35
- FWCI
- 6.17
- Type
- journal article
- Language
- en
- Open access
- gold
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