Patent ID: 6913112

Claim:
A noise attenuation assembly comprising: a shell defining an interior chamber; a passage tube having an inlet end coupled to a first end of said shell and an outlet end coupled to a second end of said shell; an overlap tube concentric to and surrounding an overlap portion of said passage tube, said overlap tube forming an annular gap with said overlap portion of said passage tube, said overlap portion of said passage tube defining at least one opening in communication with said annular gap, said annular gap having a closed end and on open end in communication with said interior chamber; and at least one noise prevention pad disposed within said annular gap, said at least one noise prevention pad having a first surface in contact with said overlap portion of said passage tube, and a second surface in contact with said overlap tube wherein said passage tube has an inner wall defining a gas passage and an outer wall having said at least one noise prevention pad attached thereon, said at least one noise prevention pad being spot welded to said outer wall of said passage tube.