| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an intake noise control device for controlling the sound pressure level of intake noise which is introduced into a cabin, according to the engine rotation speed. Ž<P>SOLUTION: This intake noise control device 1 includes a communication pipe 4, having one end communicating with an air intake duct 2 and the other end communicating with the outside air, and an elastic body closing the communicating pipe 4. Three communication branch pipes 38a to 38c are provided closer to the side of the outside air than to the elastic body. The three communication branch pipes 38a to 38c are respectively provided with opening ends 42a to 42c, on the side of the outside air having mutually different distances from a dash panel DP. A blocking member arranged between the elastic body 6 and a communication part 34 on the side of the outside air is formed with a cavity, allowing one of the three communication branch pipes 38a to 38c to communicate with the elastic body, as seen from the out-of-plane direction of the elastic body. The blocking member is displaced, as the engine speed increases, thereby the elastic body is made to communicate with the communication branch pipe 38 having the opening end 42 on the side of the outside air, located close to the dash panel DP. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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