| 摘要 |
PROBLEM TO BE SOLVED: To provide an intake pipe suitably securing silence of an intake system of a vehicle and generating sound comfortable for an operator. SOLUTION: The intake pipe 10 is provided with an intake duct 11, a resonator 12, an air cleaner 13 and an air cleaner hose 14. Also, the intake pipe 10 is provided with a vibration film 16 and a resonance pipe 15 as an intake sound amplifying mechanism. Intake sound generated at an intake duct 11 at a time of introduction of fresh air is reduced by the resonator 12 in the intake pipe 10 and silence of an inside of the vehicle is secured. On the other hand, the resonance pipe 15 performs air column resonance at specific frequency and the vibration film 16 resonates with the air column resonation and amplifies comfortable intake sound of the specific frequency. Consequently, the resonance pipe 15 and the vibration film 16 can selectively transmit only comfortable sound to the inside of the vehicle without deteriorating silence of the inside of the vehicle. COPYRIGHT: (C)2006,JPO&NCIPI
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