| 摘要 |
A teaching machine is used with a card to pose a question to a user of the machine and to accommodate both a first case wherein a voice signal is audibly reproduced before the user enters his answer to the question into the machine and a second case wherein a voice signal is audibly reproduced after the user enters his answer into the machine. The machine includes a signal reproducer that cooperates with a card upon which a control signal, a correct-answer signal encoding a correct answer to the question and a voice signal are recorded and that reproduces the recorded signals from the card. A user of the machine enters a test answer to the question into the machine via a keyboard. A first memory responds to the correct-answer signal as reproduced by the signal reproducer for storing the correct answer, and a second memory responds to the keyboard for storing the test answer. A comparator responds jointly to the first and second memories for comparing the correct answer and the test answer and producing an output signal in accordance with the comparison. Lamps responsive to the comparator output signal indicate whether or not the test answer is correct. An audio channel jointly responsive to the control signal and the voice signal as reproduced by the signal reproducer audibly reproduces the voice signal before making the comparison in the first case and after making the comparison in the second case.
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