| 摘要 |
PURPOSE:To listen to explanation from its beginning at any time by controlling the switching of a receiver, which receives an acoustic magnetic waves sent from a loop antenna arranged for each block, by pulse signals recorded on a tape for explanation. CONSTITUTION:In respective blocks B2, B3, B4, and B5 of a garden A divided by fence D, loop antennas F1, F2, F3, and F4 are extended indepedently. Then, an acoustic magnetic wave or electric wave transmitted from each loop antenna is received by a receiver G that a visitor carries with him or her to listen to explanation which corresponds to each block. In this case, an endless tape on which the explanation of every block is recorded is sectioned by sentences and pulse signals which turn on and off the recorder G right after the ending of each sentence are recorded. Therefore, the receiver G is not in operation during the explanation and, while turning on the start of the next sentence, turns off on the end. Consequently, the visitor can listen to the explanation from its beginning at any time. |
