Acoustic quarter wave tube absorber

Details Acoustic quarter wave tube absorber Acoustic quarter wave tube absorber

G - Physics

10

K

G10K 11/172 (2006.01) F01N 1/02 (2006.01) F01N 1/22 (2006.01) F02M 35/00 (2006.01) F02M 35/12 (2006.01)

Patent

CA 2153855

An intake system for an internal combustion engine is disclosed having an intake air duct for transferring intake air to the engine. The inlet air duct has a quarter-wave acoustical tuner in operable communication with the intake air flow to attenuate sound frequencies in the duct. The quarter-wave tuner has a first, opened end which communicates with the air flow, a tubular body and a second end which is closed by a moveable diaphragm. The diaphragm is moveable under the force of a sound wave traversing the tuner and is operable to extend the attenuation range of the tuner.

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