| 摘要 |
A ribbon microphone includes two magnets spaced in parallel and generating a magnetic field therebetween, two ribbon diaphragms arranged in parallel at a predetermined distance in the magnetic field, and a step-up transformer raising the voltages of electric signals generated in response to vibrations of the ribbon diaphragms in the magnetic field and outputs the raised electric signals. The step-up transformer includes two primary windings and two secondary windings corresponding to the two ribbon diaphragms, one of the two ribbon diaphragms and one of the two primary windings of the step-up transformer are connected in parallel whereas the others are connected in parallel, and the two secondary windings of the step-up transformer are connected in series so as to have opposite polarities. The ribbon microphone exhibits enhanced shielding effect without shielding a step-up transformer and does not generate noise caused by electromagnetic induction.
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