耳机的工作原理（How does the headset work）.docVIP

耳机的工作原理（How does the headset work） How does the headset work? According to the acoustic drive mode of transducer used in earphone, it can be divided into moving coil (Dynamic) and electrostatic (Electrostatic), piezoelectric, moving iron, pneumatic, electromagnetic and so on. Moving coil earphone Also known as electric headphones. At present most of the headset parity are such that the principle is similar to the electric loudspeaker in the permanent magnetic field in the winding of the cylindrical coil is connected with the diaphragm, coil driven diaphragm sound signal in the current drive. With the headset dynamic loudspeaker diaphragm is different from that of the speaker speaker diaphragm edge fixed in the elastic medium (folding ring and damper) on (for example in large caliber bass units), the diaphragm is generally flat conical, made of elastic medium provides vibration system in force; grassot headset, diaphragm edge is directly fixed on the frame of the drive unit, the diaphragm is folded, vibration force completely by the diaphragm material stretching and contraction and fold deformation to provide, so draw ring type headset drive unit of the diaphragm design material selection and the shape of the final unit the sound quality is very large, but also very delicate. Moving coil drive unit technology is now very mature, technology will not change greatly, the current improvement is mainly to develop higher density permanent magnet, more ideal vibration film material and design. At the same time, the maturity of technology makes its corresponding cost lower, more competitive, and high popularity of the market. Electrostatic Also known as static plane diaphragm, the conductive body (usually aluminum coil) direct plating or printing on plastic film is very thin, accurate to a few microns (the electrostatic headset diaphragm of a new generation of STAX is accurate to 1.35 micron); the strong electrostatic field (usually by DC the high voltage generator and a fix