| 摘要 |
In the equipment, a filter circuit(20) which extracts signals only in a predetermined frequency region is connected to a signal comparator(40), whose rear end is connected to magnetic tape players(50) and (51) in parallel. Thus, the comparative read signal below the predetermined frequency region drives the player (50) to give audio information leading to relaxation, while the other read signal above the predetermined frequency region drives the other player(51) to give audio information including study course along with the maintenance of relaxation.
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