Sound absorptive hollow core structural panel
US6021612A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 16, 1996 |
| Grant date | Feb 8, 2000 |
| Priority date | — |
| Expiry date | Jul 16, 2016 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE04B2001/8485
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A sound absorbing hollow core panel of structural material based on Helmholtz resonator properties consisting of two exterior skins connected by spacers or structural connections and bounded by perimeter skins or structural connections with internal cavity or cavities that communicate with the exterior sound field through a plurality of orifices in one or both exterior skins as well as the perimeter of the panel and that have a plurality of Helmoltz resonators of different shapes and sizes tuned to specific frequencies that control the sound absorption characteristics of the hollow core panel. The internal cavity or cavities are defined by external skins and perimeters as well as internal structural elements acting as interior dividers, interior sub-volumes and perimeter structures, each of which may contain a plurality of orifices for sound communication forming a sequence of first order Helmholtz acoustical resonators with respective natural frequencies for sound absorption. Panels may be assembled with or without selected interior elements or perimeter structures as a basis for infinite flexibility in building sound absorbing walls of selectable sound absorbing characteristics a…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.