| 摘要 |
<P>PROBLEM TO BE SOLVED: To transmit sound having good acoustic characteristics to a wide range in the periphery of a musical instrument. <P>SOLUTION: This musical instrument includes: an upper case body 10 in which a keyboard part KB is disposed on a top face part 11; and a lower case body 20, wherein the top face part 21 of the lower case body 20 is coupled and fixed to the lower surface part 12 of the upper case body 10. The lower case body 20 has a front 23, a back 24, a left side 25 and a right side 26 as peripheral face parts as the sides connected between the top face part 21 and the base part 22. A plurality of sound releasing parts SP (SP1-SP10) are disposed in the peripheral face parts of the lower case body 20. In at least three of the sound releasing parts, for example, in the sound releasing parts SP3, SP5, SP8, when segments connecting the respective central positions and the center point PO are L1, L2, and L3, the sound releasing points SP3, SP5, SP8 are disposed so that the segment L3 exists in a region on the side of an obtuse angle θ made between the segments L1, L2. <P>COPYRIGHT: (C)2010,JPO&INPIT |
