| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a keyboard instrument in which a whole musical instrument is made small with excellent acoustic performance, and in which a player can satisfactorily hear performance sound without sense of incongruity. <P>SOLUTION: An opening 33 which is open to inside and outside of a musical instrument body 1, at a bottom plate 3 of the musical instrument body 1 in which a keyboard part 8 is provided inside, is provided and a speaker 32 for output of sound to the inside of the musical instrument body 1 is provided, at a lower surface of the bottom plate 3 of the musical instrument body 1, corresponding to the opening 33. When the speaker 32 generates performance sound, the performance sound is output from the opening 33 of the bottom plate 3 to the inside of the musical instrument body 1, and the output performance sound is output from a keyboard part 8 side in the musical instrument body 1 to front outside of the musical instrument body 1. Thereby, as the speaker 32 is provided in the outside of the musical instrument body 1, the musical instrument body 1 is formed small, to make a whole musical instrument small, and the performance sound output from the keyboard part 8 side in the musical instrument body 1 to front outside of the musical instrument body 1 can be satisfactorily heard by the player without sense of incongruity. <P>COPYRIGHT: (C)2011,JPO&INPIT |
