Notes
Outline
Non-linear Digital Processor for dedicated loudspeaker systems
A. Bellini, G. Cibelli, E. Ugolotti, A. Farina, C. Morandi
Outline
Loudspeaker physical conformation;
Loudspeaker non-linear modeling;
Digital audio Processor for distortion compensation;
DSP implementation;
Measured distortion results;
Basic loudspeaker conformation
Loudspeaker modeling
Loudspeaker modeling
Loudspeaker non-linear modeling
Audio processor
DSP implementation
DSP implementation
 Audio processor implemented with a 320C54x  DSK;
 40 MIPS, 10Kword Dual Access RAM;
 Sampling frequency 23148 Hz;
 Converter resolution 14 bit.
Multirate Audio processor
Audio processor measurements
SPL Results
SPL Results
SPL Results
Conclusion
Definition of a non-linear model for low frequency loudspeaker systems;
Design of a parametric audio processor for the compensation of non-linear distortion of loudspeaker;
 Implementation of the audio processor with a low cost commercial DSP;
 Measured reduction of Distortion with the insertion of the audio processor;