The microphones produced in the world have one common feature - they all work using one membrane which is attached to the sound coil which vibration speed in constant magnetic field provoke the appearance of an output voltage. In this discussion we examine the ability to improve the parameters of an electrodynamic microphone with two acoustical entrances with the usage of a membrane with different construction. The new membrane consists of two membranes which are glued mirrorly to one another and the glueing point is at the top of the touching surfaces, the touching point of the cupolas.
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