Conventional methods used to identify the nonlinear parameters of a loudspeaker suffer from limited accuracy due to the so-called multiplicity problem. To overcome this major drawback, a two stage harmonic balance method is proposed. Parameters estimated by the proposed method describe the linear and nonlinear dynamic characteristics of a loudspeaker more accurately than do conventional methods. Moreover, the proposed method substantially eliminates the shift of resonance frequencies in frequency response functions for large inputs, and can then accurately depict the dynamic behavior of diaphragm displacement. Higher order frequency response functions (HFRFs) are derived to perform the sensitivity analysis by varying the physical parameters estimated for a loudspeaker. Through the simulations with the thus derived HFRFs it is shown that nonlinearities of stiffness are closely related to the second-order harmonic distortion and intermodulation of diaphragm displacement, and nonlinear damping coefficients are related to the third-order harmonic distortion and intermodulation.
Click to purchase paper as a non-member or you can login as an AES member to see more options.
No AES members have commented on this paper yet.
To be notified of new comments on this paper you can
subscribe to this RSS feed.
Forum users should login to see additional options.
If you are not yet an AES member and have something important to say about this paper then we urge you to join the AES today and make your voice heard. You can join online today by clicking here.
