The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 21, 2003
Filed:
Sep. 28, 2000
John Anthony Diamond, Kenmore, WA (US);
The Boeing Company, Seattle, WA (US);
Abstract
An acoustic panel comprises a core layer of honeycomb whose opposite sides are covered by face sheets each comprising a perforated metal plate and a sheet of metal cloth such as woven wire or metal felt. The perforated metal plates are bonded to the core and the metal cloth sheets form the outer surfaces of the panel. Each metal cloth sheet has an acoustic resistance of 5 to 300 Rayls. The perforated metal plates have an open area of about 20 to 40 percent in preferred embodiments. Noise in a nozzle is suppressed by disposing a plurality of the acoustic panels in the nozzle duct with the panels oriented radially and spaced apart about a circumference of the duct.