Fluidic element noise and vibration control constructs and methods
US6009180A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 17, 1996 |
| Grant date | Dec 28, 1999 |
| Priority date | — |
| Expiry date | Sep 17, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10K11/175
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
Fluidic constructs, including grouped stacks of fluidic elements, that provide countersound to control sound in a noisy environment, prevent radiation of sound from vibrating surfaces, reduce sound-induced vibration of surfaces, and absorb sound that might otherwise impact on surfaces, are provided. These constructs may have a wide range of geometries for specific applications, but generally include a face plate on one side, and a back plate on the other side. Supply ports on the back plate provide a supply of fluid that flows through the construct, while undergoing acoustic modulation through fluidic amplifiers. The face plate includes input ports that sense sound waves to be controlled, and transmits this sound to influence the acoustic modulation of the supplied fluid. The construct produces an amplified output, having sound out of phase with the sound sensed by the input ports, at output ports on the face plate in a sufficient volume to substantially neutralize incoming sound waves, or reduce sound radiation from an object. Any sound produced by the construct of the invention that is substantially in phase with sound to be neutralized is dumped at a sufficient distance from the…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.