Human brain seamlessly integrates multisensory stimuli to synthesize complementary information for enhanced perceptions, depending on neural principles of superadditivity, inverse effectiveness, and temporal congruency. Replicating multisensory integration in artificial intelligences has remained challenging due to the inefficiency of algorithmic fusions and the absence of hardware-native mechanisms. Here, we demonstrate biomimetic audiovisual integration at the device level of Bi2O2Se ferroelec