Acoustics – Sound-modifying means – Muffler – fluid conducting type
Reexamination Certificate
2006-06-02
2008-08-26
San Martin, Edgardo (Department: 2837)
Acoustics
Sound-modifying means
Muffler, fluid conducting type
C181S253000, C181S241000, C181S271000, C181S206000, C060S322000, C060S226300, C415S145000, C415S119000
Reexamination Certificate
active
07416051
ABSTRACT:
An assembly useful in reducing aircraft engine noise such as turbofan engine noise (730) comprises: (1) at least one tube “H-Q” having an inlet end (738), an outlet end (740) and a central tube portion therebetween; an (ii) at least one actuator operatively interconnected to at least one tube, wherein the actuator is capable of causing dynamic response by the tube. The assembly of this invention may be used in a method for reducing noise, the method comprising: (a) providing means for generating non-uniform noise energy about an inner surface and within a disclosure having at least an inlet; (b) providing an assembly for reducing noise comprising; (i) at least one tube having an inlet end, an outlet end and a central tube portion therebetween, and (ii) at least one actuator operatively interconnected to at least one tube, wherein the actuator is capable of causing dynamic response by the tube; and (c) directing at least a portion of the non-uniform noise into the assembly.
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Byrne Stuart
Moe Jeffrey W.
Goodwin & Procter LLP
Martin Edgardo San
Rohr Inc.
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