| 摘要 |
A musical percussion instrument consists of more than three integrally formed, substantially linear, elongate sections. The sections are not colinear, but are substantially coplanar. The sections form a shape, and are made from a material (typically metal or a ceramic material) which has vibrational properties such that, when one section is struck with a mallet, the instrument emits a musically concordant sound. The mathematical analysis leading to alternative designs for such an instrument having five sections (termed a ''pentangle''), made by bending mild steel rod, is presented. The sound produced by the instrument may be acoustically or electronically amplified. An array of ''pentangles'' (60), each tuned to different pitch, may be assembled to provide the equivalent of a keyboard instrument. |
