Acoustic insulation device for mobile vehicle

摘要

Provided is an acoustic insulation device for a mobile vehicle in which sound transmitted to the exterior of the vehicle body is blocked by being reflected or diffracted by acoustic insulation bodies provided upright to the vehicle body; and the amount of noise that an observer or local residents are subjected to is further reduced. Movement of a mobile vehicle generates noise in, and in the vicinity of, a power collector or a similar device provided upright on the roof (3) of the vehicle. Acoustic insulation bodies (1L), (2L), (1R), (2R) are provided upright on the roof (3), and block noise travelling directly ahead. The noise is diffracted or reflected by the acoustic insulation bodies (1L), (2L), (1R), (2R), and moves so as to be transmitted to the vehicle exterior. However, a branched, blade-shaped acoustic insulation body (1LB) provided to the acoustic insulation body (2L), or branched acoustic insulation bodies (1RB1), (1RB2) provided to the acoustic insulation body (2R), act on the diffracted or reflected noise to block sound, and therefore makes it possible to provide an acoustic insulation device for a mobile vehicle in which transmission to the outside of the vehicle body is minimized and the resulting noise is reduced.

主权项

1. An acoustic insulation device for a mobile vehicle having at least one acoustic insulation body provided upright on a roof of the vehicle body on roof on both sides in a width direction of the vehicle body so as to oppose to a device disposed; wherein
in order to suppress transmission of a noise generated in, and in the vicinity of, the device and diffracted or reflected on the acoustic insulation body, an acoustic insulation body branched from the at least one acoustic insulation body is provided to at least one side or to both sides of an outer side and an inner side in the width direction of the vehicle body; the at least one acoustic insulation body provided upright to the roof is a wall body having a chevron shape in the longitudinal direction of the vehicle body, and the branched acoustic insulation body is a blade-shaped acoustic insulating body with both ends of the branched acoustic insulation body in the longitudinal direction of the vehicle body extended obliquely upward with respect to the longitudinal direction of the vehicle body; and the acoustic insulation device and the branched acoustic insulation body acts on the noise to an outer side of the vehicle body.