Mode canceling composite panel for greater than mass-law transmission loss in the principal speech bands
US4106588A · kind A · utility
11Cited by
7References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 29, 1976 |
| Grant date | Aug 15, 1978 |
| Priority date | — |
| Expiry date | Jul 29, 1996 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE04B2001/8461
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A composite panel is described in which the face sheets and the core have properties such that the panel produces a double wall resonance near the low frequency end of the principal speech bands and in which the panel produces interaction between the symmetric and antisymmetric mode in the principal speech bands, thereby providing greater than mass-law transmission loss over a substantial portion of the audio frequency spectrum. At frequencies above the principal speech bands effects are determined primarily by the properties of the individual face sheets.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.