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Role Of The Voice Coil
Oct 14, 2016

(1) when the speaker's magnetic field strength b the voice coil in the magnetic gap through current when I, the voice coil will be subjected to an electric force F=BLI (l is the coil length), and press the left-hand rule. Here the voice coil is one of the stress factors, is the heir of force, but also on the size of the force has played a role.
(2) stress occurs, including voice-coil vibration vibration system with a speed v, and voltage is induced in audio circles BLv, its direction in line with the right-hand rule, and the current in the opposite direction. When the voice coil is the initial response of damping and damping of the heir.
(3) sound circle of quality if compared big, will makes vibration system of resonance frequency reduced, but while will makes speakers efficiency and sensitivity reduced, also will makes speakers replay high frequency ceiling reduced; sound circle of quality if compared small, is will makes vibration system of resonance frequency improve, while will makes speakers of efficiency and sensitivity improve, also will makes speakers replay high frequency ceiling improve.
(4) decision speaker DC resistance and inductance of the voice coil impedance and impedance curve speaker Q0 value will also be affected, Small
Parameter. Impedance will be affected and the matching efficiency and damping factor of the amplifier. When the amplifier outputs at constant pressure, lower the impedance, the current larger speakers output sound power, the greater, at the same time bear the greater the risk of damage to your speakers.
(5) voice coil and has a lot of speaker distortion. Voice coil is placed in a magnetic field, the magnetic field distribution is not uniform, just a certain range of magnetic field distribution is uniform. Voice coil work uninterrupted motion, magnetic flux density b is not uniform, leading to uneven loading, resulting in distortion. And find out the many ways to reduce distortion.