| 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, which is otherwise restrained with respect to the drum shell by a hoop or rim fixed in place by threaded tension rods and lugs or other hoop-fixing mechanism. The single adjustment feature varies the circumference of a wedging ring, which generates an axial force expanding or retracting the tuning assembly 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. When the tuning assembly axially retracts, it decreases the upward push, variably decreasing the drumhead tension and lowering the musical pitch of the drum. |
