The independent of time component of displacement appears, apart from increase of even harmonics, if the most significant nonlinear characteristics of loudspeaker i.e. nonlinear stiffness of suspensions and nonhomogeneous magnetic field in the gap are nonsymmetrical in relation to the rest position of the diaphragm and voice coil. In some conditions, the value of this displacement can be so large, that the normal action of the loudspeaker will be disturbed. In the paper, the phenomenon is studied both theoretically and experimentally. It is proven that dependence of the constant component of frequency of modulation is different in the case of nonsymmetrical stiffness of suspension than in the case of unhomogenous magnetic field in the gap. This fact can be used to identify the reason for the appearance of constant component, its minimization and decreasing of harmonic content.
Click to purchase paper as a non-member or login as an AES member. If your company or school subscribes to the E-Library then switch to the institutional version. If you are not an AES member and would like to subscribe to the E-Library then Join the AES!
This paper costs $33 for non-members and is free for AES members and E-Library subscribers.