A self-supporting sound barrier for the operator's cover of a construction type vehicle is supported within the operator's cover at the perimeter of the sound barrier only and is self-supporting throughout the major surface area of the sound barrier. The sound barrier has strengthening and supporting materials, such as a grid structure or oriented fibers, throughout the main body of the sound barrier which lengthen during sagging of the sound barrier. As the grid sturcture lengthens, it contacts portions of the operator's cover and the sound barrier is restrained from further sagging. Prior art sound barries utilize an elaborate system of parts and assembly procedures to secure a sound barrier in place within an operator's cover. The subject self- supporting sound barrier is simple to manufacture and is easy to install and/or remove from an operator's cover.
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