| 摘要 |
A noisemaking toy with hard objects attached to terminal ends of a U-shaped handle. The hard objects can be steel ball bearings (e.g. ¾'' diameter), and the U-shaped handle can comprise a U-shaped piece of resilient spring steel wire. The legs of the handle can be pressed together by hand so that the hard objects can be contacted. The objects are shaped so that they make point contact. When the hard objects are pressed together by pressing on the legs of the handle, the objects bounce many times, producing an unusual sound. The sound is initially a rapid series of clicks, and, as energy is dissipated, the sound changes to a buzz and then a high-pitched squeak. The objects must have a hardness of at least 30, 40, or 50 Rockwell C. High hardness is preferred.
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