SOUNDPROOFED SCREEN FOR RESEARCH SOUND SYSTEMS EXHAUST ENGINES WHEELED VEHICLES

摘要

The invention relates to the technique of investigation of noise sources wheeled vehicles performed in semi-anechoic acoustic, hard sound-reflecting chamber floor. Noise insulation screen for studying the noise of exhaust systems ICE exhaust gas wheeled vehicle comprising, in particular, bearing strut, a sound insulation panel of the sliding type as a metal casing, two layers of lining its surface vibroshumodempfiruyuschego bituminous material and layers of a porous open cell sound absorbing material. A distinctive feature of the utility model is that at least a portion of a sound insulating panel is covered by a layer of protective sound-absorbing heat-resistant fabric material, wherein the bearing display rack equipped string hanging device in the form of two support arms and two metal strings, supporting brackets comprise a guide groove, and an adjusting screw for adjusting the string tension, and are able to move in the vertical direction; thermofilter fabric is suspended on said stringed suspension device, with a predetermined movement in the horizontal direction to install it in the most thermally loaded zone sound insulating panel. Particularly useful model relates to structures antinoise devices used for experimental studies bench shumozaglushayuschih efficiency characteristics of the intake silencer system and in the exhaust of engines wheeled vehicles, primarily cars.