Abstract
The noise at the operator's position of a U. S. Textile Company Ringtwister has been analyzed. Variations in the noise level due to spindle finish, belt tension, belt width, and spindle speed are discussed. By varying the finish on the spindle (e.g., plastic coated and grooved), noise levels were varied over a range of 13 dBA. The variation in noise level with belt tension was 3 dBA. Reduction in the width of the belt reduced the noise levels. A doubling of the speed increased the noise levels by approximately 7 dBA. A partial enclosure, designed to enclose the spindles on the machine, was constructed of 16-gauge metal with damping material and absorptive material applied to the inside. A total reduction of 10 dBA at the operator's position was achieved through the use of the spindle enclosure.
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