Patent ID: 8389841

Claim:
An adjustable resonator stop comprising: a resonator end member configured to be disposed within an interior dimension of a resonator of a keyboard percussion instrument to form a closed end of an air column defined by the resonator; a resonator engaging body configured to be disposed within the interior dimension of the resonator and to engage inner walls of the resonator, the resonator engaging body having a first end and an open second end defining a cavity configured to receive the resonator end member; and a tightening member configured to be coupled to at least a portion of the resonator end member, the tightening member configured to move the resonator end member relative to the resonator engaging body from a disengaged position to an engaged position with the resonator end member engaging the resonator engaging body and being disposed at least partially within the cavity of the resonator engaging body, wherein the resonator engaging body is disengaged from the resonator in the disengaged position such that the resonator stop is able to traverse within the resonator, and wherein the resonator engaging body engages the resonator in the engaged position such that the resonator stop is fixed within the interior dimension of the resonator.