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在小信号条件下对具有相同匝数的扬声器长、短音圈进行了仿真,重点讨论了扬声器电-力变换因数与音圈位移的非线性关系,发现在位移变化时,长线圈的电-力变换因数的变化率较小,但在小位移时短线圈能够提供较大的电-力变换因数;同时研究了音圈电感与频率、位移的联系,发现长音圈电感的变化率较小,随着频率升高因趋肤效应音圈的电感都逐渐下降。可见长音圈具有较高的保真性,而短线圈因有较高的电-力变换因数与电感,更适合于小位移的高频段。
Under small signal conditions, the long and short voice coils with the same number of turns were simulated. The nonlinear relationship between the electro-mechanical conversion factor of the loudspeaker and the displacement of the voice coil was mainly discussed. When the displacement was changed, the long- The rate of change of the force conversion factor is small, but the short coil can provide a large electro-mechanical conversion factor when the displacement is small. At the same time, the relationship between the inductance of the voice coil and the frequency and the displacement is studied, and the change rate of the inductance of the long voice coil is found to be small , As the frequency increases due to skin effect voice coil inductance gradually decreased. It can be seen that the long voice coil has higher fidelity, while the short coil is more suitable for the high frequency range of small displacement due to the higher electric-power conversion factor and inductance.