| 摘要 |
PURPOSE:To provide the acoustic generator capable of always generating acoustics suitable for the operating tempo of a user. CONSTITUTION:The number of output pulses to be received within fixed time is counted by a counter 4, which receives the output pulse of a detection circuit 2 for detecting vibrations and generating pulses according to a timing pulse from a pulse generating circuit 3, and outputted through a latch circuit 5 to a bidirectional switch circuit 7. Corresponding to this output, the bidirectional switch circuit 7 switches the resistance value of a CR oscillation circuit 6 and changes the tempo of a melody generated from a melody generating circuit 1. By repeatedly performing this operation, the tempo of the melody generated from the melody generating circuit 1 is changed corresponding to the cycle of vibrations detected by the detection circuit 2. |
