Some misunderstandings on the cognition of the electrostatic loudspeaker

As a kind of high-tech products, the electrostatic speaker has a huge potential market. Therefore, the production enterprises of the key technology of the blockade is very natural. And because of the high cost of electrostatic speakers, less contact with the professional staff, thus resulting in the following understanding of the misunderstanding:
1．In order to obtain the fundamental constant of the charge distribution, it is suggested that the semiconductor material is used to design the film. Because of the characteristics of the semiconductor material, such as temperature and light, the scheme of the film is obviously not feasible. The best solution for the design of the vibrating membrane is as follows: 106~108, cm, high strength, ultra thin and flexible materials.
2．In order to omit the polarization power supply, the material is used in the production of diaphragm. It is considered that the polar body is a permanent polarization or a charged membrane, and the polarization voltage is not required. But the experiments show that the use of the material in the production of the film is not appropriate. Another consideration is to take the polarization of the audio signal. This is based on polarization diaphragm, although the need for a higher voltage, but the current is very small (about equal to or less than 10 [mu] a), consideration of power consumption is minimal. The defect of this method is that one is the inevitable distortion, and the two is the structural complexity.
3．Mistakenly believe that the electrostatic speaker is easy to absorb dust. This is due to the phenomenon that there is a lot of electrostatic environment is easy to dust. In fact, the condition of electrostatic dust accumulation is that the electrostatic dust must first be ionized dust particles. And the electrostatic speaker is working under the condition of alternating electric field, the electric field intensity exceeds a certain critical value, which can be ionized dust and dust cleaner, in normal working condition, the electric field strength is less than the critical value. Therefore, in the design of the excessive consideration of dust is completely unnecessary.
4．It is considered that the electrostatic loudspeaker is not suitable for higher sound pressure. Early electrostatic speakers do exist such a problem. Reason is that early electrostatic loudspeaker diaphragm multi-purpose pure metal material is made, low tensile strength, in high pressure rupture easily damaged, coupled with early electrostatic loudspeaker fixed electrode poor insulation, when the loud pressure playback. Because of the amplitude of the movable electrode is larger, the two electrodes of the insulating medium is high voltage breakdown. Corona induced. Along with the development of material industry, high polymer and high strength film materials are used in static speaker. In addition, there is no problem to obtain the insulation material of 6KV above. The experimental results show that the effective vibration area is 10000mm2, and the static speaker can output the sound pressure of 110dB for a long time.