Numerical and experimental generation of interior multi-regional sound field reproduction based on auditory masking effects

A multi-regional sound field reproduction framework that integrates auditory masking effects and the frequency spectra of different audios is constructed, designed to achieve high-quality reproduction tailored for vehicular environments. By incorporating Bark domain characteristics and loudness sensitivity, reproduction thresholds are calculated based on speech broadcast and piano music, enhancing reproduced performance in alignment with auditory perception. To address reproduction challenges in the targeted frequency intervals, an amplitude optimizing algorithm is developed by selecting the applicable reproductive amplitudes and performing numerical solutions. In contrast to pressure matching, this algorithm ensures more stabilized acoustic contrast between regions with lower reproduced differences and high-precision performance in the dark region with greater differences. An experimental platform incorporating the boundaries of vehicular sound cavities is established to verify the reproduced performance of multi-regional sound fields in free-fields and vehicular environments. Experimental results indicate that, regardless of the experimental situation, compared to traditional audio superposition, the proposed reproduction framework can achieve prominent multi-regional sound field based on masking effects. Starting from the auditory perception and reproduction requirements specific to vehicular environments, this paper provides an innovative foundation for multi-regional sound field reproduction in practical applications.