Targeted Reproduction Method of Interior Sound Field Based on Stabilized Biconjugate Gradient

Abstract:

Aiming at requirements of intelligent modulation in vehicle acoustic environment for drivers and passengers，a targeted sound field reproduction method is proposed based on stabilized biconjugate gradient （BiCGSTAB） to collectively improve the acoustic energy contrast and sound field planarity. Considering parametric results of the contribution weight on the in-vehicle sound acoustic arrays to the acoustic environment， and combining the automotive scenario to divide the target acoustic regions， the cabin acoustics model for the drivers and passengers are first constructed. By defining the acoustics problems related to sound field reproduction and combining with the parametric results that the sound pressure response of target regions with respect to sound source distribution positions， the interior acoustics model for drivers and passengers is constructed. Furthermore， the targeted reproduction framework of interior sound field is constructed embracing the given expected sound field， and the driving signals of sound sources are iteratively obtained based on BiCGSTAB. Focusing on acoustics energy contrast， sound field planarity and other indicators， the interior sound field reproduction performance is analyzed in detail. The results show that the proposed method can effectively avoid the abnormal convergence in solving the acoustics complex linear equations， and can achieve the high-quality reproduction about the acoustics amplitude and phase information in vehicle target regions

Key words:interior sound field;sound field reproduction;acoustics transfer function;stabilized biconjugate gradient