초록 ▼

A side branch resonator for attenuating sound waves of first and second frequencies, the side branch resonator comprising a discharge branch; a resonator branch; an inlet branch flow connected to the discharge branch having an axis, the resonator branch having a wall which defines a resonator branch

A side branch resonator for attenuating sound waves of first and second frequencies, the side branch resonator comprising a discharge branch; a resonator branch; an inlet branch flow connected to the discharge branch having an axis, the resonator branch having a wall which defines a resonator branch interior; the resonator branch having an open resonator branch end and a closed resonator branch end; the resonator further comprising an attenuation member for attenuating the first frequency sound waves. The attenuation member is located in the resonator branch interior a first distance from the axis and upstream from the resonator branch closed end. The closed resonator branch end is located a second distance from the axis to provide attenuation of the second frequency sound waves.

대표청구항 ▼

[ Having described the invention, what is claimed is:] [1.] A side branch resonator for attenuating sound waves at first and second frequencies, the resonator comprising a resonator body having a first branch with an open end; and a second branch defining a second branch interior, the second branch

[ Having described the invention, what is claimed is:] [1.] A side branch resonator for attenuating sound waves at first and second frequencies, the resonator comprising a resonator body having a first branch with an open end; and a second branch defining a second branch interior, the second branch having a closed end; the side branch resonator further comprising attenuating means for attenuating sound waves at a first frequency, the attenuating means located in the second branch interior away from the closed end, the closed end adapted to attenuate sound waves at a second frequency, the resonator further comprising a third branch with an axis and wherein a first distance is defined between the axis and the attenuating means, the first distance being equal to one quarter the wavelength of the first frequency sound waves.