| 摘要 |
The proposed solution to problems associated with pad leveling and effective tone hole closure, employs a pad with a beveled backer that is relatively rigid, and an adjoining contact layer that seals a corresponding tone hole when a musical instrument key is actuated. In one embodiment, the backer features a sloping side wall, and optionally a side wall portion having a curved contour. Leveling of the pad is accomplished by placing the backer partially within a pad cup, adjusting the pad orientation while maintaining sliding contact between the backer and the pad cup, and fixing the pad within the pad cup. The backer is preferably shaped to provide support to all portions of the contact layer. Another embodiment features a step-bevel backer that is sized to fit a pad cup, and preferably supports all portions of an adjoining contact layer whose diameter exceeds that of the pad cup.
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