To solve such a problem that, in a manner of reducing noise inside a cabin by reducing vibration transmitted to component members of the cabin mounted on a working and traveling vehicle, the feeling of discomfort that a driver receives is not much improved because sound pressure distribution in a cabin is so complicated that, even when additional mass bodies are simply added symmetrically to both right and left sides of the cabin, right and left noise differences still remain, although it is possible to reduce an average noise as a whole.
The additional mass bodies 5 of difference mass between right and left for reducing the noise in the cabin 3 are provided on the component members of the cabin 3 supported and mounted on a vehicle body 1 via an elastic body 2 or on an auxiliary member 4 integrated with the elastic body 2.
YOSHINO MASAHIKO
DOI KAZUNORI
KUDO TAKESATO
OCHI KOJI
HAGIYAMA TAKESHI
KAJIWARA TAKAYUKI
