| 摘要 |
PROBLEM TO BE SOLVED: To make adjustable the rhythm of operation of an individual performance without causing an interference to others by providing a rhythm signal sound generation means, an adjustment means for changing an interval of a rhythm signal sound and a rhythm signal sound generation means driving source means in a case loadable in an earhole. SOLUTION: The case 1 consists of a housing part 1a and a loading part 1b insertable into the earhole. A sound IC provided with a rhythm signal sound generation means, a rhythm signal interval adjustment circuit and a rhythm signal sound intensity adjustment circuit is integrated attachably/detouchably into the housing part 1a, and the rhythm signal sound generation means is constituted together with a speaker fitted to the loading part 1b. Further, a timing volume 3 being an adjustment means of a rhythm signal sound interval, the volume 4 being the adjustment means of rhythm signal intensity and a source switch 5 are provided on the peripheral surface of the housing part 1a. A button type battery being the rhythm signal sound generation means driving source means is housed in the inside of a cap 1c. |
