4.3 REALIZATION OF LINEAR PHASE CROSSOVER LOUDSPEAKER NETWORK USING IIR
D. Sookcharoenphol(1), K. Janjitrapongvej(1) & S. Tomiyama(2)
(1) Information Engineering Department, Facultly of Engineering, KMITL, Bangkok, THAILAND. (2) Department of Embedded Technology, School of Information Technology and Science, TOKAI University, Kanagawa, JAPAN.
In this paper, a real-time realization technique of a two-band linear-phase digital loudspeaker crossover network
using digital IIR filters is proposed. The proposed system gives linear time-invariance by truncating the infinite
impulse response of all sub-IIR filters to a finite length. Moreover, the proposed loudspeaker crossover network
achieves desirable properties because the overall magnitude response do not have a boost or dip around the
cross over frequency, which is significant to high-quality loudspeaker crossover networks. In addition, simulation
results show that the proposed system provides an overall flat magnitude and group delay responses and also
gives higher slope and stopband attenuation than the prototype elliptic IIR filter.