Multi-layered acoustic liner
US3948346A · kind A · utility
127Cited by
7References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 2, 1974 |
| Grant date | Apr 6, 1976 |
| Priority date | — |
| Expiry date | Apr 2, 1994 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24165
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
This invention concerns a multi-layered acoustic liner which breaks up high amplitude sound and shock waves into several waves of the same type but smaller amplitudes, converting some acoustic energy into heat and shifting part of the acoustic energy to a higher frequency level to achieve better absorption by the atmosphere. The sandwich-type perforated plate acoustic liner comprises several layers of honeycomb backing material which are separated by thin perforated sheets.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.