Acoustic metamaterial with simultaneously negative effective mass density and bulk modulus
US8857564B2 · kind B2 · utility
18Cited by
13References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 29, 2013 |
| Grant date | Oct 14, 2014 |
| Priority date | — |
| Expiry date | Oct 29, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10K11/18
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A device with simultaneous negative effective mass density and bulk modulus has at least one tubular section and front and back membranes sealing the tubular section. The front and back membranes sealing the tubular sections seal the tubular section sufficiently to establish a sealed or restricted enclosed fluid space defined by the tubular section and the membranes, and restrict escape or intake of fluid resulting from acoustic vibrations. A pair of platelets are mounted to the membranes, with the individual platelets substantially centered on respective ones of the front and back membranes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.