| 摘要 |
PROBLEM TO BE SOLVED: To increase degree of freedom of a controllable frequency range by inhibiting generation of stress due to difference of thermal expansion coefficient. SOLUTION: This structure is provided with a pipe body 2 branched and connected to a part of an air intake channel, a bulkhead 3 which divides the inside of the pipe body 2 and can synchronize with the sound of specific frequency, a seal means 31 air-tightly sealing a part between the bulkhead 3 and the pipe body 2, a stress relaxation means 31 relaxing stress generated due to difference of thermal expansion coefficient between the pipe body 2 and the bulkhead 3. The bulkhead 3 is retained on the pipe body 2 via the stress relaxation means 31. The stress acting on the bulkhead 3 from the pipe body 2 is relaxed by the stress relaxation means 31. COPYRIGHT: (C)2008,JPO&INPIT
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