| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem that it is difficult for an infant who cannot grip a pencil well yet to have training for listening a sound with conventional constitution, and the infant cannot write a music sheet well with the listened sound using the pencil.SOLUTION: A card 5 is fitted in a main body 1. Cycles (length) of projections/recesses are so determined that the position where a note is put can be changed in units of one tone. |
