| 摘要 |
An air conditioner duct connected to a downstream side of an air flow path of a vehicular air conditioning apparatus is provided with an outer pipe portion and an inner pipe portion formed at an inner portion of the outer pipe portion, a first inner end of the inner pipe portion is integrated to an inner peripheral face of the outer pipe portion, an outer peripheral face of a second inner end of the inner pipe portion and an inner peripheral face of the outer pipe portion are separated, a side branch type noise suppressing chamber is defined by the inner peripheral face of the outer pipe portion and the outer peripheral face of the inner pipe portion, and the outer pipe portion is provided with an adjusting portion continuous to an upstream side of an air flow path of the first inner end.
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