| 摘要 |
<p>PROBLEM TO BE SOLVED: To amplify a sound volume by applying a structure in which the vibration at a fingerboard end of a string-rubbing instrument is used as a new vibration source and the vibration at a fingerboard end high-tone string side corner is also transmitted to a rear board face in a body. SOLUTION: A vibration transmitting member auxiliary contour 1 is formed from a fingerboard end high-tone string side corner 3 through a round hole 2 on an f-shaped sound hole head up to a rear board face just under the part by a single member formation or a double member formation comprising a part outside the body and a part inside the body. In the case of the double member formation, such a structure is applied that the vibration of the a fingerboard end high-tone string side corner 3 having strong vibration according to bridge vibration, and the vibration of a part projecting from the periphery of an edge a little to the body outside of the round hole 2 on the f-shaped sound hole head, the place where the vibration is strongest on a front board 4 toward the body head part, are combined and transmitted to the rear board face just under the part, by applying a structure in which two members of the part outside the body and the part inside the body are contacted on the position including the front board 4 near the edge a little to the body outside of the round hole 2 on the f-shaped sound hole head.</p> |
