| 摘要 |
Ringing noise in a tube or in tubes comprising a propeller shaft of an automotive drive is attenuated by an elastomeric ring positioned in each shaft. The elastomeric ring is a split ring, preferably made of recycled rubber, wherein the ring normally has a rectangular shape and is bent into a cylindrical shape for insertion in the tube. The outward bias of the ring is sufficient to hold the ring in place within the tube, while a gap in the material of the ring allows the ring to exert further expansive force against the inner surface of the tube while the tube is rotating. A single ring located midway between the ends of a tube is sufficient to attenuate ringing noise in one example of a tube, however a plurality of spaced rings may be used in other tube configurations to attenuate ringing noise. Preferably, the elastomeric ring has an axial extent of about 5% of the length of the tube.
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