Also: sonic crystals, locally resonant materials, band gap, resonance
Engineered structures that block, bend or steer sound using arranged resonators and lattices.
Values as stated in the cited paper's abstract.
| Property | Value | Source |
|---|---|---|
| Test frequency of resonant slab | 400 Hz (2 cm slab) | Liu 2000 |
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Cummer, Christensen and Alù reviewed acoustic metamaterials for controlling sound.
As reported in: Cummer, Christensen, Alù (2016). Controlling sound with acoustic metamaterials. Nature Reviews Materials. doi:10.1038/natrevmats.2016.1
Abstract only
Liu and colleagues built sonic crystals of small resonators that block sound at wavelengths 100 times their spacing; a 2 cm slab beat the normal mass law of sound transmission by an order of magnitude or more at 400 Hz.
As reported in: Liu, Zhang, Mao et al. (2000). Locally Resonant Sonic Materials. Science. doi:10.1126/science.289.5485.1734
Abstract only
Martínez-Sala and colleagues measured sound attenuation by a periodic sculpture.
As reported in: Martínez-Sala, Sancho, Sánchez et al. (1995). Sound attenuation by sculpture. Nature. doi:10.1038/378241a0
Abstract only