Effect of handy microphone movement in Mixed Reality visualization system of sound intensity
* Presenting author
We proposed a system of real-time measurement and visualization for three-dimensional (3D) sound field by using Mixed Reality (MR) device. MR device enables effective visualization of information with depth perception using the 3D computer graphics (3DCGs) superimposed on the real world. Our system can superimpose 3D sound intensity data on the measurement points in the see-through head mounted display (STHMD). Visualizing the 3D sound intensity map by the MR visualization system helps us to design the sound field and to detect the source of noise. We measure sound intensity in the measured area by scanning a handy 4-ch microphone freely and slowly. The camera of STHMD recognizes an AR marker installed at the microphone and the measurement point is detected form the position and rotation of the AR marker. However, the measurement results of sound intensity would be affected by the doppler effect because of microphone movements. In this paper, we investigate the effect of microphone movements using a simulation. In addition, we obtain the moving speed of microphones with AR marker in the MR visualization system and compensate the value of sound intensity by the measured microphone speed.