Abstract
Acoustical metamaterials with negative mass density and negative bulk modulus enable negative elasticity and in turn artificial elasticity. This demonstrates the form invariance or symmetry of the acoustic field equation and in turn the symmetry properties of the acoustic fields. An example of an acoustical metamaterial demonstrating artificial elasticity is given.
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References
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Gan, W.S. (2018). Artificial Elasticity. In: New Acoustics Based on Metamaterials. Engineering Materials. Springer, Singapore. https://doi.org/10.1007/978-981-10-6376-3_4
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DOI: https://doi.org/10.1007/978-981-10-6376-3_4
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