Cell-box-type noise barrier having large magnitude of transmission loss and noise insulating method
US4042061A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 9, 1976 |
| Grant date | Aug 16, 1977 |
| Priority date | — |
| Expiry date | Mar 9, 1996 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE04B2001/8452
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A noise barrier having a large magnitude of transmission loss is disclosed which is formed of a cell-box-type noise barrier comprising (A) a hollow cell-type block having a perforated sound-absorbing plate disposed on the side confronting the source of noise and a sound-insulating plate disposed on the opposite side relative to said perforated sound-absorbing plate and incorporating therein a sound-absorbing material and (B) a free-spacing plate disposed opposite said sound-insulating plate across a space and held in position by the medium of an elastic member, with a free air layer intervening between said free-spacing plate and said sound-insulating plate. Also disclosed is a method for insulating noise by providing a free-spacing plate at a distance from a noise source in such a way as to create a free air layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.