Attaining Speech Quality via Multiple Bone-Conducted Michrophones in Highly Noisy Environments

• Project/Area Number: 17K00225
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Perceptual information processing
• Research Institution: Saitama University
• Principal Investigator: SHIMAMURA Tetsuya 埼玉大学, 理工学研究科, 教授 (40235635)
• Project Period (FY): 2017-04-01 – 2020-03-31
• Project Status: Completed (Fiscal Year 2019)
• Budget Amount: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000); Fiscal Year 2019: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2018: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2017: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
• Keywords: 骨伝導

Outline of Final Research Achievements

A bone-conducted microphone is less sensitive to ambinent noise compared with an air-conducted michrophone. However, the signle use of a bone-conducted michrophone is not enough in severely noisy environments. In order to expand the range of use of a bone-conducted michrophone, we aim to develop a multiple michrophones system for the purpose of attaining the quality of speech even in highly noisy environments.

Academic Significance and Societal Importance of the Research Achievements

AI技術の進展に伴い、画像から音へとその利用方法が検討され始め、今後の音利用の発展には雑音対策が不可欠となってくると言われている。しかし、騒音環境、特には、劣悪な騒音環境で利用できるマイクロホンが存在しない。本研究は、その解を与える重要なものである。複数マイクロホンを利用し、極めて劣悪な環境下においても、音質の確保ができるシステムの構築を目指している。

Research Products

• [Journal Article] Amplitude Variation of Bone-Conducted Speech Compared with Air-Conducted Speech (2019)
  • Author(s): M. S. Rahman and T. Shimamura
  • Journal Title: Acoustical Science and Technology Volume: 40 Pages: 293-301
  • NAID: 130007700251
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Multisensory Speech Enhancement Using Lower- Frequency Components from Bone-Conducted Speech (2019)
  • Author(s): M. S. Rahman, A. Saha and T. Shimamura
  • Journal Title: IEEJ Trans. Electrical and Electronic Engineering Volume: 14 Pages: 1661-1666
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Linear-Prediction-Based Accurate Spectrum Estimation with Pitch Extension for Bone-Conducted Speech (2018)
  • Author(s): M. A. Rahman and T. Shimamura
  • Journal Title: Journal of Signal Processing Volume: 22 Pages: 277-286
  • NAID: 130007521318
  • Peer Reviewed / Open Access
• [Presentation] Improvement of Minimum Statistical Spectrum for Beamforming (2018)
  • Author(s): W. Takashima, Y. Sugiura and T. Shimamura
  • Organizer: IEEE International Conference on Communication and Information Systems
  • Int'l Joint Research