Patent ID: 7802651

Claim:
An air duct assembly for vehicles, comprising: an air duct including: an inlet port formed in one end of the air duct, the inlet port being configured to intake air from outside the air duct; an outlet port formed in another end of the air duct, the outlet port being coupled to an air cleaner; and an air hole formed in a path along which intake air flows; and a filter unit mounted to the air hole of the air duct, the filter unit being formed of a polyurethane foam and configured to attenuate noise in all frequency bands of the intake air introduced through the air duct, the filter unit including: a first filter bent at an edge thereof downwards to have a first bent part; a second filter coupled to a lower portion of the first filter, and bent at an edge thereof upwards to have a second bent part; and a chamber defined in a central portion between the first and second filters which are in surface contact with each other, wherein the chamber is configured to reduce a velocity of the intake air which passes through the first filter.