The characteristics of high frequency sp

Now the speaker is mostly type, its upper frequency speaker to reach 20KHZ, we look at the electric speakers, as shown in figure 1 and promoting the sound circle for F, plates can be decomposed into longitudinal force F Fe and lateral force due to the existence of the Ft, the Ft that produces alternating curved surface plates, thus make sport transverse vibration plates, formed in waves that standing wave frequency characteristics of the speaker at high frequencies produces change, the characteristic curve is not uniform. To overcome this shortcoming, is trying to reduce the weight of the plates, thus reduce inertia (weakened) and improve plates of transverse vibration of hardness of the Ft (caused by the plates for people to bend) frequency speaker made a lot of improvement measures plates with cymbals, such as metal plates, this paper plates made not only hard and light. Another boron hardness and high elastic coefficient is good, the plates with titanium materials, made into 10-20 microns thick matrix, then will base plates in a vacuum in 25 ¡ã C, the high temperature, with strong beam bombardment boron, make its evaporated deposition in titanium matrix surface, so the speaker 36KHZ can reach the ceiling frequency.
To further improve the speaker's cap from structure on frequency, reforming the. There is a limit of 50KHZ speaker adopts frequency is a structure, as shown in figure 2. 6 permanent magnet into two group, vibration by magnetic system 7-8 membrane microns polymer film, soft, light above the diaphragm attached 10 microns thick aluminum ribbon sound circle. When the current through the voice coil, according to the current direction, will produce different membrane and F F + force - simply does not exist. Due to the lateral force diaphragm lightweight, diaphragm movement, so little inertia speakers are especially good. The frequency response