Horn is a convert electrical energy into sound equipment, different electron energy is transmitted to the coil, the coil generates a magnetic field to interact with an energy magnet, causing the tray vibration, since the electron energy change at any time, the speaker of the coil will move forward or backward sports, so the speaker will follow the movement of the tray, this time, the degree of density of air movement will make a difference and produce the sound.
Horn sound can be divided into:
1, the moving coil. Its principle is to use a wire with a current perpendicular to the magnetic field lines between the magnets into the north and south poles, said line will be moved by the interaction between the magnetic field lines and current in a diaphragm attached to the root bead in this line, With the current changes in the movement of the diaphragm produces around.
2, electromagnetic. In the middle of a U-shaped magnet erect movable iron sheet cut, when the current flows through the coil the armature will be affected by magnetization and magnet suction exclusion phenomenon and drive the diaphragm movement.
3, inductive. And electromagnetic principles are similar, but armature doubled, while the two coil magnet and asymmetry, when the signal current through the armature to two different magnetic flux will push each other and exercise.
4, electrostatic. Usually plastic quality membrane plus inductive material such as aluminum vacuum vaporization process, two diaphragms relative placement, when one plus one other piece of positive current high pressure will induce a small current, attracted repel each other role in promoting air can sound. Electrostatic monomers are light weight, vibration scattered small, very easy to get crystal clear treble, bass dynamic skills needed, but it is not efficient, and easy to use DC original gathering dust.
5, the ribbon type. The diaphragm is made of very thin metal, the current flows directly into the path body to vibrate pronunciation. Since the diaphragm is the voice coil, so the quality is very light, excellent transient response, frequency response is also very good. However Ribbon Speaker of efficiency and low impedance of the amplifier has been a great challenge.
6, horn. Diaphragm pushing an air horn at the bottom and work, because the proliferation of so sound transmission is not very efficient, but the horn will affect the shape and length of the sound, low frequency is not so easy to be replayed