| 摘要 |
The body of drum includes an outer body, an inner body, and two positioning loops. The outer and the inner bodies are both hollow rings but are made of different materials. Each positioning loop has a first face and an opposite second face. A convex rib protrudes on the center of the width of the first face and partitions the first face of the positioning loop to a ring-shaped inner fringe and a ring-shaped outer fringe. The fringes of the two opposite ends of the outer body are disposed on the two outer fringes respectively, and the fringes of the two opposite ends of the inner body are disposed on the two inner fringes respectively. The convex rib is located between the outer and the inner bodies. Thus, the timbre can be changed by making different combinations of the inner and the outer bodies.
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