| 摘要 |
A toy eg a doll or animal incorporates a receiver adapted to reproduce sound from a transmitter so that the plaything seems to talk. The transmitter derives speech from a microphone or tape player and passes it, via an infrared, radio or ultrasound link, to the receiver inside the toy. A monostable 4 is intended to pass a signal at a substantially constant level to the speaker 7 irrespective of the strength of the received signal, i.e. the distance between receiver and transmitter. <IMAGE> |
