Research on extracting acoustic information from high-speed data obtained by optical interferometer

• Project/Area Number: 19K14929
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 20010:Mechanics and mechatronics-related
• Research Institution: Tokyo University of Agriculture and Technology (2022); Waseda University (2019-2021)
• Principal Investigator: Yatabe Kohei 東京農工大学, 工学(系)研究科(研究院), 准教授 (20801278)
• Project Period (FY): 2019-04-01 – 2023-03-31
• Project Status: Completed (Fiscal Year 2022)
• Budget Amount: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000); Fiscal Year 2022: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2021: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2020: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2019: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
• Keywords: 光学的音響計測 / 信号処理

Outline of Research at the Start

マイクロホンなど従来の方法では原理的に計測できない音場に対して，レーザ干渉計を用いて非接触に音を計測する光学的音響測定の研究を進めている．計測法やデータ解析手法に関する検討を行い，光学的に測定可能な音響現象の種類を増やしてきた．一方，現実の応用問題へ適用するにあたり，これまで取り組んだ計測法自体の改善に加え，計測されたデータに対する発展的な信号処理も検討する必要があるが，現状は基礎検討に留まっている．本研究では，これまで発展させてきた光学的音響測定手法を現実の工学的問題に適用することを目指し，光学干渉計によって測定された音響データに対する信号処理について検討を行う．

Outline of Final Research Achievements

For extending the range of application of optical sound measurement, several research topics have been investigated. They include image processing for acoustic information retrieval, array processing for optical sound measurement, three-dimensional sound field reconstruction from optical projection, and measurement instrument calibration. The research results indicate that there are some room for measuring sound fields that have not been investigated. In addition, we showed that acoustic information can be extracted by applying signal processing to those data.

Academic Significance and Societal Importance of the Research Achievements

従来の研究では測定されてこなかった音場を光学的に測定できることを示したことにより，音の情報が重要な工学的または工業的な応用に適用可能な範囲を広げることができた．それにより，光学的音響計測を実用に近付けることができた．

Research Products

• [Journal Article] Determination of microphone acoustic center from sound field projection measured by optical interferometry (2023)
  • Author(s): Hermawanto Denny、Ishikawa Kenji、Yatabe Kohei、Oikawa Yasuhiro
  • Journal Title: The Journal of the Acoustical Society of America Volume: 153 Issue: 2 Pages: 1138-1146
  • DOI: 10.1121/10.0017246
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Visualization of sound wave from high-speed moving source (2022)
  • Author(s): Akutsu Mariko、Uda Toki、Yatabe Kohei、Oikawa Yasuhiro
  • Journal Title: Acoustical Science and Technology Volume: 43 Issue: 6 Pages: 339-341
  • DOI: 10.1250/ast.43.339
  • ISSN: 0369-4232, 1346-3969, 1347-5177
  • Year and Date: 2022-11-01
  • Peer Reviewed / Open Access
• [Journal Article] Underwater sound visualization and temperature measurement using high-speed interferometer (2022)
  • Author(s): Yoshida Souta, Tanigawa Risako, Yatabe Kohei and Oikawa Yasuhiro
  • Journal Title: Acoustical Science and Technology Volume: 43 Issue: 3 Pages: 177-187
  • DOI: 10.1250/ast.43.177
  • ISSN: 0369-4232, 1346-3969, 1347-5177
  • Year and Date: 2022-05-01
  • Peer Reviewed / Open Access
• [Journal Article] Speckle holographic imaging of a sound field using Fresnel lenses (2022)
  • Author(s): Ishikawa Kenji、Yatabe Kohei、Oikawa Yasuhiro、Shiraki Yoshifumi、Moriya Takehiro
  • Journal Title: Optics Letters Volume: 47 Issue: 21 Pages: 5688-5688
  • DOI: 10.1364/ol.469972
  • Peer Reviewed / Open Access
• [Journal Article] Optical measurement of sound field near musical instruments (2021)
  • Author(s): 石川憲治, 矢田部浩平, 及川靖広
  • Journal Title: THE JOURNAL OF THE ACOUSTICAL SOCIETY OF JAPAN Volume: 77 Issue: 9 Pages: 601-608
  • DOI: 10.20697/jasj.77.9_601
  • NAID: 130008095433
  • ISSN: 0369-4232, 2432-2040
  • Year and Date: 2021-09-01
  • Peer Reviewed / Open Access
• [Journal Article] Physical-model-based reconstruction of axisymmetric three-dimensional sound field from optical interferometric measurement (2020)
  • Author(s): Ishikawa Kenji, Yatabe Kohei, Oikawa Yasuhiro
  • Journal Title: Measurement Science and Technology Volume: 32 Pages: 045202-045202
  • DOI: 10.1088/1361-6501/abce73
  • Peer Reviewed / Open Access
• [Journal Article] 偏光高速度干渉計を用いた音響現象の可視化と計測 (2019)
  • Author(s): 及川靖広, 谷川理佐子, 矢田部浩平, 石川憲治
  • Journal Title: 騒音制御 Volume: 43 Pages: 207-210
• [Journal Article] 音の光干渉計測 ～ 並列位相シフト干渉法による流れと音の同時可視化計測 (2019)
  • Author(s): 石川憲治, 谷川理佐子, 矢田部浩平, 及川靖広, 大沼隼志, 丹羽隼人
  • Journal Title: 光学 Volume: 48 Pages: 241-241
• [Presentation] Acoustic application of phase reconstruction algorithms in optics (2022)
  • Author(s): Tomoki Kobayashi, Tomoro Tanaka, Kohei Yatabe and Yasuhiro Oikawa
  • Organizer: IEEE Int. Conf. Acoust., Speech Signal Process. (ICASSP)
  • Int'l Joint Research
• [Presentation] 光学的音響計測のための信号処理 (2019)
  • Author(s): 矢田部浩平
  • Organizer: 日本音響学会
  • Invited
• [Presentation] Estimating sound intensity from acoustic data captured by parallel phase-shifting interferometry (2019)
  • Author(s): F. Imaeda, K. Ishikawa, K. Yatabe and Y. Oikawa
  • Organizer: Int. Congr. Acoust. (ICA)
  • Int'l Joint Research
• [Presentation] Interferometric measurement of aerodynamic sound generated by parallel plates inside flow field (2019)
  • Author(s): R. Tanigawa, K. Yatabe and Y. Oikawa
  • Organizer: 48th Int. Congr. Expo. Noise Control Eng. (inter-noise)
  • Int'l Joint Research
• [Presentation] Guided-spatio-temporal filtering for extracting sound from optically measured images containing occluding objects (2019)
  • Author(s): R. Tanigawa, K. Yatabe and Y. Oikawa
  • Organizer: IEEE Int. Conf. Acoust., Speech Signal Process. (ICASSP)
  • Int'l Joint Research
• [Presentation] Extracting sound from flow measured by parallel phase-shifting interferometry using spatio-temporal filter (2019)
  • Author(s): R. Tanigawa, K. Ishikawa, K. Yatabe, Y. Oikawa, T. Onuma and H. Niwa
  • Organizer: SPIE Def. Commer. Sens.
  • Int'l Joint Research