| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem wherein a resonator to be attached to an intake tube for an automobile is necessary to attenuate the acoustic energy by resonating the engine intake noise of an automobile inside of a resonance box of a resonator attached to the intake tube for an automobile formed by blowing a thermoplastic resin, the problem wherein a technology for absorbing the noise by providing an attachment formed of an elastic protruding sheet and a non-woven fabric inside of the intake tube costs high because it needs a process for attaching the attachment of the elastic protruding sheet and the non-woven fabric later, and the problem in the case of using an air conditioning duct for an automobile formed by blow-molding a thermoplastic resin wherein the vibration noise of an engine room is transmitted through the outer wall of the duct and the transmitted noise is transmitted to a cabin through the duct. SOLUTION: A noise absorbing material is attached to the inner wall of a parallel part near an opening part in at least one part of an intake tube or an air conditioning duct. COPYRIGHT: (C)2011,JPO&INPIT
|
