Nonlinear distortion of horn loudspeakers can be compensated by prefiltering the electrical input signal inversely. A new filter architecture is derived from the results of nonlinear loudspeaker modeling using static nonlinear and dynamic linear subsystems. This special structure requires less computational effort and less memory than other generic architectures and allows complete compensation for the modeled nonlinear mechanisms. In practice, simplified versions of this filter can be implemented to compensate for dominant nonlinearities only. System identification performed on a particular horn loudspeaker provides valuable information about the dominant nonlinearity and allows adjustment of the free filter parameters. The implementation of an adequate filter structure for a professional loudspeaker in a DSP56000 is discussed, and results of the distortion reduction are presented.
Author:
Klippel, Wolfgang
Affiliation:
Harman International Industries, Inc., Northridge, CA
JAES Volume 44 Issue 11 pp. 964-972; November 1996
Publication Date:
November 1, 1996
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.