| 摘要 |
PROBLEM TO BE SOLVED: To make effective use of space while combining soundproofness with economical efficiency by simple constitution regarding a sound absorbing structure of an engine room. SOLUTION: First covers 1, 8 facing the engine room 10 of a working machine include openings 2, and sound absorbing materials 3 are stuck to the engine room 10 side of the first covers 1, 8 to block the openings 2. It is preferable to cover the outer peripheries of the first covers 1, 8 with second covers 4, 18 to partition the outside and the inside of the working machine. COPYRIGHT: (C)2011,JPO&INPIT
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