Dual layer acoustical ceiling tile having an improved sound absorption value
US6443256B1 · kind B1 · utility
66Cited by
24References
13Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 27, 2000 |
| Grant date | Sep 3, 2002 |
| Priority date | — |
| Expiry date | Jan 10, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W30/91
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
An acoustical ceiling tile having an improved sound absorption value and having a dual layer of acoustical materials. The base mat layer has either no mineral wool or a low mineral wool content. The surface layer has a high mineral wool content which provides improved sound absorption values with or without perforating or fissuring the tile. The dual layer acoustical ceiling tile has a noise reduction coefficient (NRC) value of at least about 0.50.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.