Herschel-Quincke tube for vehicle applications

Details Herschel-Quincke tube for vehicle applications Herschel-Quincke tube for vehicle applications

2006-03-28

2006-03-28

Martin, Edgardo San (Department: 2837)

Acoustics

Sound-modifying means

Muffler, fluid conducting type

C181S273000, C181S276000, C181S266000, C181S253000, C181S250000

Reexamination Certificate

active

07017707

ABSTRACT:
An HQ tube arrangement suitable for packaging within a vehicle may be designed by creating a mathematical model representing a tube arrangement having a first passageway and a second passageway fluidly connected to the first passageway at first and second junctions. The second passageway is divided by the junctions into first, second, and third passages. Lengths are associated with each of the first passageway and the first, second, and third passages. A filter parameter, based upon an average transmission loss for a particular frequency over a standard deviation, is analyzed as a function of the lengths. Lengths are chosen based upon analysis of the filter parameter. Portions of the outer walls of the first and second passageways may be secured to or common to one another so that lengths of the passageways run along side of each other to provide a more compact HQ tube arrangement.

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U.S. Appl. No. 10/453,274.
U.S. Appl. No. 10/360,075.

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