Total-internal reflection elastic metasurfaces: design and application
| DWPI Title: Acoustic shield for protecting vibrational sensitive device, comprises first and second unit cells having super cell, where transmission of vibrational wave from first side to second side of super cell is attenuated |
| Abstract: An acoustic shield for protecting a vibrational sensitive device includes a first unit cell and a second unit cell. The first unit cell includes a first locally resonant unit. The first locally resonant unit controls a first phase gradient and the first unit cell includes a first surface. The second unit cell includes a second surface proximate to the first surface. The second unit cell includes a second locally resonant unit embedded along the second interface. The second locally resonant unit controls a second phase gradient. The first phase gradient is different from the second phase gradient. The first unit cell and the second unit cell comprise a super cell. The acoustic shield is configured such that a vibrational wave from a first side of the super cell to a second side of the super cell is substantially attenuated. |
| Use: Acoustic shield for protecting a vibrational sensitive device of an apparatus (claimed) for blocking transmission of vibrational waves in an engineered system and habitable space. |
| Advantage: The acoustic shield is designed such that a vibrational wave from a first side of the super cell to a second side of a super cell is substantially attenuated. The shield reduces or eliminates acoustic vibrations of the vibrational sensitive device in an effective manner. |
| Novelty: The shield comprises a unit cell (118) with an interface between two media with a locally resonant unit (128) embedded along the interface, where the unit controls a phase gradient (130). The other unit cell has another surface proximate to the former surface, and has another interface between third and fourth media with another locally unit. The latter locally unit controls another phase gradient that is different from the former phase gradient, where transmission of a vibrational wave from a side of a super cell (114) to another side of the super cell is attenuated. The media have a rectangular block connected to the resonant units. |
| Filed: 5/15/2019 |
| Application Number: US16413441A |
| Tech ID: SD 14812.0 |
| This invention was made with Government support under Contract No. DE-NA0003525 awarded by the United States Department of Energy/National Nuclear Security Administration. The Government has certain rights in the invention. |
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