Holographic-based directional sound device
US11979710B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Sep 23, 2020 |
| Grant date | May 7, 2024 |
| Priority date | — |
| Expiry date | Jan 26, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10K11/30
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A holographic-based directional sound device is provided, the device including: a sound wave generating means generating a sound wave; and a flat plate configured to have the sound wave generating means installed at the center so as to radiate the sound wave to the outside through a surface, and to be composed of a plurality of unit cells, in which at least one groove is formed on a surface of the unit cell, and a radiation angle of the sound wave is determined according to a depth of the groove with respect to the unit cell, wherein the depth of the groove is determined by an individual surface admittance calculated by a cosine function or a sine function of the sum of a first value and a second value on the basis of a preset radiation angle of the sound wave and a preset frequency of the sound wave.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.