Fan and compressor noise attenuation
US6973193B1 · kind B1 · utility
20Cited by
14References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 28, 2000 |
| Grant date | Dec 6, 2005 |
| Priority date | — |
| Expiry date | Feb 28, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10K11/175
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
An exciting sound wave generator is positioned within a nacelle of a jet engine at its inlet to generate an exciting sound wave having a primary frequency generally different from a frequency of the primary tone of the noise. The exciting sound wave is used to modulate the primary tone of the noise and, therefore, distribute sound energy of the noise from the primary tone to a broad range of side bands so that the amplitude of the primary tone of the noise is reduced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.