Electric-powered loudspeaker most widely used, it is divided into cone type, number drum and dome-shaped three.
1, the cone speaker
Cone speakers also called dynamic speaker.
It consists of three parts: ① vibration system, includes a tapered cone, voice coil and damper, etc; ② magnetic system, including permanent magnets, magnetic board and field stem etc; ③ auxiliary systems, including Penjia , wiring board, the pressure side and the dust and the like. When the voice coil in a magnetic field when current is passed through audio, the audio is generated with the current changes in magnetic field and the magnetic field of the permanent magnet interact, so that the voice coil along the axial vibration, due to its simple structure speaker, bass fullness , sound soft, frequency bandwidth, but lower frequency.
2, No. Drum speaker
No. Drum speaker structure, which consists of the vibration system (tweeter) and the Horn of two parts. Speaker and speaker cone vibration system similar, except that it is not a cone diaphragm, but a dome-shaped diaphragm. Vibrating diaphragm through the horn (after two reflections) radiating sound waves into the air. Its high frequency, large volume, commonly used in outdoor and square PA.
3, the dome-shaped speaker
Dome-shaped speaker diaphragm generally hemispherical top shape designed to increase the strength of the diaphragm. Dome-shaped speaker diaphragm usually rigid, lightweight material, the diaphragm aperture is generally small. In order to adapt the intermediate frequency and high-frequency signal playback, dome-shaped mid-range speakers have a larger rear cavity resonance frequency as the intermediate frequency resonance chamber. Usually open at the rear side of the diaphragm has a through hole at its lower jaw after the rear chamber is equipped with a sealed cover to cover between the rear chamber and the lower jaw forms a relatively
Alt ball given speaker unit
Large volume of the cavity, the cavity usually filled with a number of sound-absorbing materials, and high-frequency dome-shaped speaker is no rear chamber.
Dome-shaped speaker can be divided into soft dome speakers and hard dome speaker diaphragm according to the degree of soft and hard. Soft dome speakers sound more delicate and soft, expressive, more suitable for the performance of strings and vocals, percussion when performance does not look stiff. Higher compared to hard-dome high frequency speaker sensitivity, tone often with a special "metallic taste." Although both speaker has a wide frequency range and uniform frequency response, but different diaphragm material used, they are therefore slightly different timbre. Soft dome speakers sound often seem soft and delicate, and hard dome speaker sound will give a clear outline of feeling.