Do you know dynamic microphone and condenser microphone?

The so-called moving coil microphone (hereinafter referred to as moving coil microphone) and capacitive microphone (hereinafter referred to as capacitor microphone) refer to the types of microphone receivers. The common microphones on the market are mainly divided into these two types. So what's the difference between the two in working principle? Moving coil Miley uses the principle of electromagnetic induction. The wire coil is mounted on the diaphragm, and then placed between the magnetic fields of the magnet. With the change of sound pressure, it continuously moves in the magnetic field to produce an induced current, thus converting the sound signal into an electrical signal. Its principle of energy exchange is similar to that of loudspeakers.

The capacitor Miley uses the charging and discharging principle of the capacitor. The vibration of the sound drives a plate (ultra-thin metal film) of the capacitor. The vibration of the plate changes the distance between the two plates, and then changes the capacitance. When the capacitance becomes larger, the power source charges the capacitor; when the capacitance becomes small, the capacitor discharges, causing current in the circuit and converting the sound signal into an electrical signal.