| 摘要 |
PURPOSE:To eliminate the need to rewind a sound recorded magnetic tape and to improve the convenience for educational applications by using an IC memory to record and reproduce sounds and therefore reproducing the sounds in a short time just with a switch operation. CONSTITUTION:A sound recording switch 3 is operated when necessary for sound recording, and the signal is applied to a control circuit 5 via a switch control circuit 4. Under such conditions, the electromotive force generated by a reproduction head 21 or the sound signal supplied through a microphone is digitized by an ADM encoding circuit 12 through an input amplifier 14 and an input filter 13 and then written to a memory part 7 by the information of an address circuit 6. Thus the sounds are recorded. Then the signal is applied to the circuit 5 via a switch control circuit 2 with operation of a reproduction switch 1. The circuit 5 extracts the desired sound out of the part 7 by the information of the circuit 6. This extracted sound is turned into an analog sound by an ADM endecoding circuit 8 and delivered in the form of a sound signal. In such a way, the sound can be reproduced in a short time just with a switch operation by using an IC memory for recording and reproducing of sounds. |
