| 摘要 |
An acoustic-drum tuning assembly includes a single adjustment feature to vary the drumhead tension uniformly around the drumhead's periphery. The tuning mechanism includes multiple rings located between the end of the drum shell (or support ring) and the "underside" of the drumhead. The drumhead is otherwise restrained with respect to the drum shell by a hoop or rim fixed in place by multiple conventional threaded tension rods and tuning lugs or other hoop- fixing mechanism. The single adjustment feature varies the circumference of a wedging ring, which generates an axial force causing the tuning assembly to "expand" or "retract" along the central axis of the drum. When the tuning assembly axially "expands", it pushes increasingly "upward" against the drumhead, variably increasing its tension and the musical pitch of the drum. Conversely, when the tuning assembly axially "retracts", it decreases the "upward" push, thereby variably decreasing the drumhead tension and lowering the musical pitch of the drum. |
