MUFFLER

摘要

Provided is a muffler having a double pipe portion formed therein in which an end portion of a first tubular member (10) is inserted into a second tubular member (20) from an end portion thereof. A leading end portion (23) of the second tubular member is joined to an outer periphery of the first tubular member. A portion that forms the double pipe portion of the second tubular member comprises a first portion (22) located closer to an end of the first tubular member, and a second portion (21) that is located closer to an end of the second tubular member and that has an enlarged diameter compared with the first portion. A resonance chamber (31) is formed between the first tubular member (10) and the second portion (21). A communication path (32) that allows communication between an exhaust flow path and the resonance chamber is formed between the first tubular member (10) and the first portion (22). A Helmholtz type resonant system is formed by the resonance chamber (31) and the communication path (32).