Consumer appliances speaker

Many types of speakers, their transducer principle can be divided into electric (ie moving coil), electrostatic (ie, capacitive), electromagnetic (ie reed), piezoelectric (ie, crystalline) and other several After two more for rural cable broadcast network; can be divided according to the frequency range woofer, mid-range speakers, tweeter, which is often used as a combination of speakers in speaker. Press the transducer mechanism and structure of sub Dynamic (electric), capacitive (electrostatic), piezoelectric (crystal or ceramic), electromagnetic (spring type), electric and pneumatic ion speaker, electric speaker with good acoustic performance, solid structure, low cost, wide application; material divided by the acoustic radiation cone type, number Drum, diaphragm; by the cone shape of round, oval, double cone and rubber surround; by working frequency bass, alto, soprano, and some special tape recorder into the TV special, ordinary and high-fidelity speaker; voice coil impedance divided by low and high impedance; straight points by the effect of radiation and the environment sound like. Speaker into the internal speaker and external speakers, external speakers and speaker that is commonly referred to. Built-in speaker refers MP4 player with built-in speakers, so users can not only listen to the sound can also be sent through the MP4 player through the headphone jack built-in speaker. Has a built-in speaker MP4 player, it can not external speakers, but also to avoid the inconvenience of a long strap headphone brings.