Visualization of Impulse Responses Using XR Technology

Real-time visualization of impulse responses and room acoustic parameters is an effective tool for evaluating acoustic environments. This study presents a system utilizing extended reality (XR) technology to superimpose both measured impulse responses and calculated room acoustic parameters onto real spaces, enabling immediate and intuitive assessment of room acoustics. The system employs an iPhone equipped with simultaneous localization and mapping (SLAM) functionality and a four-channel microphone to capture acoustic measurements. Measurement locations are determined using marker image recognition from a handheld sensor, and 3-D sound intensity vectors are visualized in real time as triangular cones at corresponding positions within the XR environment on AR/MR devices. Tapping a cone displays an information panel with details such as measurement ID, sound pressure level, impulse response waveform, room acoustic parameters, and other related data. The system further allows for recording and replaying these visualizations within the XR environment for subsequent analysis. Integration of LiDAR-based 3-D spatial mapping enables measurement data and acoustic indicators to be overlaid onto detailed 3-D models of the environment, providing a clear and intuitive understanding of acoustic distribution within the space.