Micro speakers are mainly composed of basin frame, magnetic steel, pole piece, sound film, voice coil, front cover, wiring board, damping cloth, etc. What is the sound production principle of miniature speakers in Dongguan speaker factory?

1. The magnetic circuit system of the loudspeaker forms an annular magnetic gap, which is filled with a uniform magnetic field (the magnitude and direction of magnetic induction are the same everywhere).
2. The vibration system of the loudspeaker is composed of a ring voice coil wound by a conductor and a diaphragm connected with it.
3. After the voice coil is fed into the signal voltage, a current is generated. The voice coil cuts the magnetic line of force and generates a force to drive the diaphragm to move up and down together, and the diaphragm drives the air to produce a corresponding sound.
4. The whole process is: electric force sound conversion.