A method for the robust equalization and distortion reduction of loudspeakers is proposed. The proposed method adopts both an IIR-type inverse filter and a feedback control. The feedback control based on model-following control theory is used to force a loudspeaker to move as a linear time-invariant (LTI) system. Accordingly, we expect the inverse filter that is specifically designed for the LTI system to work correctly. Furthermore, nonlinear distortion of a loudspeaker is expected to be reduced. Computer simulation shows that the proposed method achieves more robust equalization of a loudspeaker than inverse filtering alone. In addition, the proposed method simultaneously reduces nonlinear distortion of the loudspeaker.
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.