Acoustical damping element and method of forming same
US4349082A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 22, 1980 |
| Grant date | Sep 14, 1982 |
| Priority date | — |
| Expiry date | Dec 22, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10K11/16
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An acoustical damping element for acoustical tubing such as a hearing aid earpiece, in which a disc of wire screen is positioned over a disc of flexible fabric of a selected acoustic resistance, over the mouth of the tubing. An insertion tool of diameter slightly less than that of the interior passage of the tubing then pushes the composite layers of screen and fabric into the tubing, thereby forming the screen and fabric into closed end concentric cylinders in the passage. The cylindrical sidewall of the screen presses the cylindrical sidewall of the fabric against the interior wall of the tubing to retain the damping element within the passage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.