Mixed Reality Visualization of Instantaneous Sound Intensity with Moving 4-ch Microphone Array

To understand the sound propagation in a real space, we propose the mixed reality (MR) visualization system of instantaneous sound intensity, which can be measured at each measurement point with moving a handy microphone array in synchronization with sound reproduction. By visualizing the measured instantaneous sound intensities with an MR animation, we can observe the temporal flow of sound energy in the real space to understand the propagation of sound wave and acoustic properties, such as sound reflection.