Small-sized loudspeaker equalization based SVD-Krylov model reduction and virtual bass enhancement

Abstract

Small-sized loudspeakers due to high cutoff frequency, perform poor reproduction response, especially in low frequency. Traditional equalization methods for small-sized loudspeaker suffer from huge computational complexity when high accurate results are expected, which may lead to unacceptable time delay or pre-echo in reproduction sound. In this paper, instead of complicated low frequency equalization, virtual bass enhancement technology is introduced to restore low frequency auditory. In combination, SVD-Krylov algorithm is introduced to reduce loudspeaker model to promote the efficiency of high frequency equalization. Comparative experiments are presented and results show that the proposed approach can substantially reduce the time consumption without deterioration in accuracy of loudspeaker equalization.