Shaped acoustic absorber
US11562728B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 18, 2020 |
| Grant date | Jan 24, 2023 |
| Priority date | — |
| Expiry date | Mar 15, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10K2210/118
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A shaped acoustic absorber assembly is provided with broadband absorption. The assembly includes an acoustic panel defining a plurality of apertures, and a plurality of tubular quarter-wavelength resonators of variable lengths provided respectively aligned with the plurality of apertures and coupled to the acoustic panel. Each tubular quarter-wavelength resonator includes at least one perimeter boundary wall extending in a longitudinal length direction and defining a chamber cavity having a chamber volume. A first end defines an opening aligned with one of the plurality of apertures and coupled to the acoustic panel. A second end is provided opposite the first end, and is sealed and configured for being located adjacent a target substrate. Methods are provided for shaping the tubular quarter-wavelength resonators to coordinate with a geometry and dimensions of a target substrate and then preserving a shape of the tubular quarter-wavelength resonators in a structurally rigid configuration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.