About

Welcome! I am a research scientist in NTT communicaton science laboratories. I always seek a new way to capture/understand/control something intangible. My research area is across acoustics, optics, measurement and imaging, signal processing, and machine learning. I am currently working on developing a next-generation sound measurement using light. I am very open to any discussions and collaborations. Feel free to contact me.

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News

• Aug. 2026 — T. Ryu will present “Effect of Activation Functions in Physics-Informed Neural Networks for Acousto-Optic Tomography” at EUSIPCO 2026 in Bruges, Belgium. [Site]

• May 2026 — Our new article titled “Differentiable equivalent source method: Joint optimization of equivalent source positions and strengths with implicit geometry constraints” has been published in JASA Express Letters! [Paper]

• May 2026 — Our new article titled “Sound-field-projection synthesis using latent diffusion model for acousto-optic reconstruction” has been published in J. Acoust. Soc. Am.! [Paper]

• May 2026 — Y. Saito presented “Microphone-Less Measurement of Three-Dimensional Radiating Impulse Response of Sound Source using Spherical Harmonic-Domain Acousto-Optic Tomography” at IEEE ICASSP 2026 in Barcelona, Spain. [Paper]

• Dec. 1–5, 2025 — I will attend the ASA/ASJ Joint Meeting in Honolulu. I am co-chairing the special session “Optical Technologies for Acoustics and Vibration” and will give an invited talk titled “Deep Learning for Acousto-Optic Sensing.”

• Nov. 7th, 2025 —  Our new article titled "Temporal super-resolution with a latent diffusion model for optically measured sound field" has been published in Optics Express! [paper]

• Oct. 23–25, 2025 — I will attend the AES Show for the first time and present my work, “See Your Audio 3D: A Novel Optical Approach for the Simultaneous Visualization of Sound Fields and 3D Objects.”

• Sep. 17th, 2025 ― Our new article titled "Data-driven volumetric reconstruction for optically measured sound field using physics-constrained 3D Gaussian splatting" has been published in J. Acoust. Soc. Am.! [Paper]

• Sep. 2nd, 2025 ― Our new article titled "Spherical harmonic-domain acousto-optic tomography for three-dimensional sound-field reconstruction" has been published in J. Acoust. Soc. Am.! [Paper]

 Biography

• 02.2022 ― present  : Research Scientist, NTT Communication Science Laboratories

• 04.2020 ― present  : Adjunct Researcher, Waseda Research Institute for Science and Engineering

• 04.2019 ― 01.2022  : Research Associate, NTT Communication Science Laboratories

• 04.2016 ― 03.2019  : Research Fellow, Japan Society for the Promotion of Science(JSPS) Research Fellowship for Young Scientists

• 09.2015 ― 03.2019  : Ph.D. in Engineering from Dept. Intermedia Art and Science, Waseda Univ.

• 04.2014 ― 09.2015  : M.S. in Engineering from Dept. Intermedia Art and Science, Waseda Univ. 

 Awards

• 2023 ― Itakura Prize Innovative Young Researcher Award, The Acoustical Society of Japan.

• 2022 ― Research Promotion Award, NTT Communication Science Laboratories

• 2017 ― Best Presentation Award in 14th International Conference on Flow Dynamics (ICFD2017)

• 2017 ― 42th Awaya Kiyoshi Award from Acoustical Society of Japan

• 2016 ― First Prize - Best Student Paper Award in Engineering Acoustics, 5th Joint Meeting of Acoustical Society of America and Acoustical Society of Japan.

• 2016 ― 13th Best Student Presentation award from Acoustical Society of Japan