| 摘要 |
PROBLEM TO BE SOLVED: To provide a vibration control cabin type working vehicle improving a working environment under the load of noises while making the best use of a vibration control effect by reducing uncomfortable noises affecting ears of an operator in a specified condition. SOLUTION: In the vibration control cabin type working vehicle, a cabin (5) with an operator's seat (16), on which an operator is seated for operating various types of equipment, is supported in a vehicle underframe in a vibration isolating manner. Moreover, the vibration control cabin type working vehicle includes vehicle constituting equipment exerting noises asymmetrically to the cabin (5). On the right and left sides of the cabin (5), right and left sound absorption parts (17, 17) absorbing the noises in the cabin (5) are formed so as to face the operator's seat (16). Both of the sound absorption parts (17, 17) are set to have a difference in sound absorption characteristics equivalent to a difference in right and left sound pressure of the noises due to a specified asymmetrical sound pressure distribution. COPYRIGHT: (C)2011,JPO&INPIT
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