Patent ID: 8442243

Claim:
A ribbon microphone, comprising: a pair of magnets spaced in parallel with each other, the pair of magnets generating a magnetic field therebetween; two ribbon diaphragms arranged in parallel with each other at a predetermined distance in the magnetic field between the pair of magnets; and a step-up transformer which raises the voltages of electric signals generated in response to vibrations of the two ribbon diaphragms in the magnetic field and outputs the electric signals, wherein the step-up transformer comprises 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 with each other and the other of the two ribbon diaphragms and the other of the two primary windings of the step-up transformer are connected in parallel with each other, the two secondary windings of the step-up transformer are connected in series so as to have opposite polarities, and wherein the two primary windings of the step-up transformer corresponding to the two ribbon diaphragms receive signals in opposite phase with each other which are generated through electromagnetic conversion by the two ribbon diaphragms, and the two secondary windings of the step-up transformer connected in series so as to have opposite polarities output signals having the same phase, and noises generated by electromagnetic induction are reduced or canceled out.