Speaker Speakers knowledge
Speakers knowledge 1
A loudspeaker is an electroacoustic device that converts electrical signals into sound signals. Specifically, the work of the loudspeaker is actually to convert a certain range of audio power signals through transducers (power-mechanical energy-tone) into audible sounds with small distortion and sufficient sound pressure levels.
Many types of speakers, classification is also varied, generally according to its working principle, diaphragm shape and sound frequency range to classify.
First, the structure of the speaker
Our most common loudspeakers are electric conical baskets. Electric cone-shaped speaker that we used to say that the cone speaker, although the diaphragm is still the main cone, but at the same time there have been many polymer materials diaphragm, metal diaphragm, with a cone speaker called on the name The. Cone-shaped cone speaker roughly consists of three parts:
1, vibration system (vibration plate <cone, sound film>, voice coil).
2, the magnetic circuit system (permanent magnet <magnet>, stem <yoke 'U iron or T iron', magnetic plate <Hua Division>).
3, support the auxiliary system (centering pieces of the film), basin, pad, pad, terminal board).
The above three major system details:
1, voice coil: voice coil is a cone-shaped cone speaker drive unit, it is very thin copper wire (copper / aluminum) divided into two layers (four) around the bone plus (paper / aluminum / Film, etc.), generally around a few dozen laps, placed in the magnetic pole and the magnetic disk formed by the magnetic suspects. Voice coil and cone fixed together, when the sound current signal into the voice coil, the voice coil vibration driven cone vibration.
2, folding ring (edge flange): folding ring is to ensure that the cone along the axial movement of the speaker, to limit the lateral movement and set, and play a barrier to the cone before and after the empty circulation of the role. Folded material in addition to commonly used cone material, but also the use of plastic, natural rubber, etc., after hot bonding on the cone.
The rigidity or flexibility formed by the cantilever and the elastic wave will affect the movement speed of the cone. For the full flexibility of the horn, the elastic wave provides about 80%, the suspension is about 20% Function, its original work is to keep the voice coil in the center of the gap between the pole piece, but for the edge of the cone vibration mode, the suspension caused by the damping effect is very important, the thickness of the suspension and the choice of material drama The ability to change the response of the horn to the torsion of the cone and the ability to prevent the back of the cone from being reflected can change the combination of the amplitude and phase in the twisted mode, making it a complete component of the cone and a tool for response.
3, cone (drum paper): cone-shaped cone speaker cone-shaped diaphragm used in a variety of materials, there are generally natural fiber and man-made fiber two categories. Natural fiber often used cotton, wood, wool, silk, etc., man-made fiber just used rayon, nylon, glass fiber and so on. As the cone is the speaker of the sound radiation device, to a considerable extent determines the speaker sound performance, so no matter what kind of paper cone, requires both light and good rigidity, not because of ambient temperature, humidity changes and deformation The
4, centering tablets (elastic wave): centering tablets used to support the voice coil and cone of the binding site to ensure that its vertical and not skew. There are many concentric rings on the centering disc, so that the voice coil in the magnetic gap in the free up and down without moving, to ensure that the voice coil does not collide with the magnetic plate. The dust cover on the centering piece is to prevent the external dust from falling off the magnetic field, so as to avoid the dust and the voice coil friction, causes the loudspeaker to produce the abnormal sound.
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