TY - GEN
T1 - Digital compensation of nonlinear distortion in loudspeakers
AU - de Vries, Ruurd
AU - Berkhoff, Arthur P.
AU - Slump, Cornelis H.
AU - Herrmann, Otto E.
PY - 2003/4
Y1 - 2003/4
N2 - The authors present a method to compensate for loudspeaker distortion in real time by nonlinear digital signal processing implemented on a digital signal processor (i.e., the TMS320C30 DSP). Based on the literature, an electrical equivalent circuit of an electrodynamic loudspeaker is developed, resulting in a linear lumped parameter model. The parameters in this model are matched with the measurements of a selected test loudspeaker. The linear model is extended to include nonlinear effects by developing the parameters as a function of the voice coil excursion of the loudspeaker in a Taylor series expansion. The resulting nonlinear system is described by a Volterra series. On the basis of this description, an inverse circuit is designed for the second-order nonlinear distortion. This circuit was implemented in real time on the DSP, using a high-level design and code generation system. Simulations and experiments are presented
AB - The authors present a method to compensate for loudspeaker distortion in real time by nonlinear digital signal processing implemented on a digital signal processor (i.e., the TMS320C30 DSP). Based on the literature, an electrical equivalent circuit of an electrodynamic loudspeaker is developed, resulting in a linear lumped parameter model. The parameters in this model are matched with the measurements of a selected test loudspeaker. The linear model is extended to include nonlinear effects by developing the parameters as a function of the voice coil excursion of the loudspeaker in a Taylor series expansion. The resulting nonlinear system is described by a Volterra series. On the basis of this description, an inverse circuit is designed for the second-order nonlinear distortion. This circuit was implemented in real time on the DSP, using a high-level design and code generation system. Simulations and experiments are presented
UR - http://www.scopus.com/inward/record.url?scp=0027242933&partnerID=8YFLogxK
U2 - 10.1109/ICASSP.1993.319081
DO - 10.1109/ICASSP.1993.319081
M3 - Conference contribution
SN - 0-7803-0946-4
VL - 1
T3 - Proceedings IEEE International Conference on Acoustics, Speech, and Signal Processing
SP - 165
EP - 168
BT - ICASSP-93
PB - IEEE
CY - Piscataway, N.J.
T2 - 1993 IEEE International Conference on Acoustics, Speech and Signal Processing, ICASSP 1993
Y2 - 27 April 1993 through 30 April 1993
ER -