TY - GEN
T1 - Mixed Reality Visualization of Room Impulse Responses on Two Planes by Moving Microphone
AU - Watanabe, Yasuaki
AU - Ikeda, Yusuke
AU - Oikawa, Yasuhiro
N1 - Funding Information:
This work was partially supported by JSPS KAKENHI Grant Number 19K12049.
Publisher Copyright:
© 2022 SPIE.
PY - 2022
Y1 - 2022
N2 - Mixed Reality (MR) can be used to visualize three-dimensional (3D) sound fields in real space. In our previous study, we proposed a sound intensity visualization system using MR. The system visualizes the flow of sound energy in a stationary sound field by measuring sound intensity. However, room impulse responses (RIRs) are essential data when investigating the sound field of a room. Therefore, to demystify the time variation of the sound field, it is crucial to visualize the spatial distribution of RIRs. However, the measurement of multipoint RIRs requires considerable time and effort and a large microphone array. In this paper, we propose an MR visualization system for RIR mapping on two planes based on dynamic RIR measurement using a moving microphone. The proposed system simplifies the measurement of RIRs at multiple points owing to the dynamic measurement capabilities of a hand-held microphone. In the simulation experiment, the RIRs on the grid points were estimated from the microphone signal using the moving path of the microphone. The estimated results were visualized by the animation of RIR maps in real space using MR. From the experimental results, the MR animation of RIR maps on the two orthogonal planes can help demystify 3D sound propagation.
AB - Mixed Reality (MR) can be used to visualize three-dimensional (3D) sound fields in real space. In our previous study, we proposed a sound intensity visualization system using MR. The system visualizes the flow of sound energy in a stationary sound field by measuring sound intensity. However, room impulse responses (RIRs) are essential data when investigating the sound field of a room. Therefore, to demystify the time variation of the sound field, it is crucial to visualize the spatial distribution of RIRs. However, the measurement of multipoint RIRs requires considerable time and effort and a large microphone array. In this paper, we propose an MR visualization system for RIR mapping on two planes based on dynamic RIR measurement using a moving microphone. The proposed system simplifies the measurement of RIRs at multiple points owing to the dynamic measurement capabilities of a hand-held microphone. In the simulation experiment, the RIRs on the grid points were estimated from the microphone signal using the moving path of the microphone. The estimated results were visualized by the animation of RIR maps in real space using MR. From the experimental results, the MR animation of RIR maps on the two orthogonal planes can help demystify 3D sound propagation.
KW - Dynamic sound-field measurement
KW - Microsoft HoloLens
KW - Sound field interpolation
KW - Sound propagation
UR - http://www.scopus.com/inward/record.url?scp=85131783201&partnerID=8YFLogxK
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U2 - 10.1117/12.2631798
DO - 10.1117/12.2631798
M3 - Conference contribution
AN - SCOPUS:85131783201
T3 - Proceedings of SPIE - The International Society for Optical Engineering
BT - International Workshop on Advanced Imaging Technology, IWAIT 2022
A2 - Nakajima, Masayuki
A2 - Muramatsu, Shogo
A2 - Kim, Jae-Gon
A2 - Guo, Jing-Ming
A2 - Kemao, Qian
PB - SPIE
T2 - 2022 International Workshop on Advanced Imaging Technology, IWAIT 2022
Y2 - 4 January 2022 through 6 January 2022
ER -