| 摘要 |
An adapter comprises: an adapter unit (1) having an electric circuit (3, 4); a first contact member (5) connectable to a first contact member (6) of a first unit (7); second contact member (8) connected to the electric circuit (3, 4) and connectable to a second contact member (9) of the first unit (7); and a third contact member (13) connected to the electric circuit (3, 4) and being arranged to receive a third contact member (14) of a second unit (15). One of the first unit (7) and the second unit (15) is a set comprising a speaker (17) and a microphone (16), and the other of the first unit and the second unit being an electronic device, having a speaker output and a microphone input. The electric circuit is arranged to adapt the microphone signal of the second unit to the microphone signal required by the first unit.
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