It is a kind of diaphragm. The design requirement of the diaphragm in headphones is that the lighter the mass and the better the rigidity, the better. Such a diaphragm can completely convert the kinetic energy of the coil into sound. Generally, dynamic headphones use composite diaphragms, which is what we call plastic diaphragms. This kind of diaphragm is low in cost and easy to process, but its elasticity is average and its rigidity is poor. It is no problem to use, but it is still worse than the biofiber diaphragm. Bio-diaphragm is another material type of diaphragm. Wool diaphragm, silk diaphragm, paper diaphragm, etc. are all biological diaphragms. They are all made of natural biological fibers, but they have different performance. different. Biological diaphragm is a kind of bacterial cellulose, which is a metabolite of acetic acid bacteria. This fiber is a kind of nano-scale fiber. After drying, the diaphragm can have a rigidity much higher than that of ordinary synthetic fibers. It is used for vibration. The membrane can have good high frequency extension and resolution. Moreover, the vibration conduction speed of this material is extremely high, which has a good effect on reducing high-frequency distortion. So to put it simply, it means that the biofiber diaphragm is better than the ordinary composite diaphragm, which can also be understood as better sound quality.