Development of speech articulation estimation and presentation system for emergency broadcast system by sound field rendering

• Project/Area Number: 26350460
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Social systems engineering/Safety system
• Research Institution: Doshisha University
• Principal Investigator: Tsuchiya Takao 同志社大学, 理工学部, 教授 (20217334)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Project Status: Completed (Fiscal Year 2016)
• Budget Amount: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000); Fiscal Year 2016: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2015: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2014: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
• Keywords: CE-FDTD法 / 防災無線 / 音空間レンダリング / GPU / ボクセライザ / FDTD法 / 情報伝達

Outline of Final Research Achievements

In this study, an estimation and presentation system of speech articulation for emergency broadcast system is developed by sound field rendering. The compact explicit-finite difference time domain (CE-FDTD) method is applied to the rendering. A voxelizer is developed for arbitrary boundary shape for the CE-FDTD method. Some demonstrations are made for a numerical model of 400×200×50 m with sampling frequency of 8 kHz by the sound field rendering. The rendering results are then reproduced by the 24ch loudspeaker array system. It is confirmed that the realistic speech articulation can be represented by this developed system.

Research Products

• [Presentation] CE-FDTD法による球面上の音圧解析 (2015)
  • Author(s): 山下 脩，土屋隆生，岩谷幸雄，大谷 真，井口 寧
  • Organizer: 日本音響学会2015年度春季研究発表会
  • Place of Presentation: 中央大学
  • Year and Date: 2015-03-18
• [Presentation] 音空間レンダリングのための任意形状の取り扱いについて -その1 境界条件- (2014)
  • Author(s): 土屋隆生，山下 脩，岩谷幸雄，大谷 真，井口 寧
  • Organizer: 日本音響学会2014年度秋季研究発表会
  • Place of Presentation: 北海学園大学
  • Year and Date: 2014-09-04
• [Presentation] 音空間レンダリングのための任意形状の取り扱いについて -その2 適用例- (2014)
  • Author(s): 山下 脩，土屋隆生，岩谷幸雄，大谷 真，井口 寧
  • Organizer: 日本音響学会2014年度秋季研究発表会
  • Place of Presentation: 北海学園大学
  • Year and Date: 2014-09-04