A research on acoustic information transmission to local spot using audible sound

• Project/Area Number: 21656097
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Single-year Grants
• Research Field: Communication/Network engineering
• Research Institution: Akita Prefectural University
• Principal Investigator: TAKANE Shouichi 秋田県立大学, システム科学技術学部, 准教授 (90236240)
• Project Period (FY): 2009 – 2011
• Project Status: Completed (Fiscal Year 2011)
• Budget Amount: ¥3,450,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥150,000); Fiscal Year 2011: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2010: ¥1,300,000 (Direct Cost: ¥1,300,000); Fiscal Year 2009: ¥1,500,000 (Direct Cost: ¥1,500,000)
• Keywords: 信号処理 / ランダムベクトル / 信号分解 / 音源配置 / 指向性 / スポット / 再生精度 / 秘匿性 / 周波数軸 / 時間軸 / 音源数 / 秘話性 / 音声信号 / 信号合成 / ランダム信号 / 短時間フーリエ変換

Research Abstract

Methods to transmit information in sound to a specific local spot with ordinary audio equipments via audible sounds were discussed in this research. It was found out as the results that the reproduction of speech signal at the spot and the delivery of distorted sound at the point except the spot are possible with decomposition of original signal into random vectors and output of the decomposed signals from sound sources located in various directions and distances. However, there remained the unresolved matter that the information involved in the original signal is almost always audible from the synthesized sound at the point except the spot.

Research Products

• [Journal Article] Sound source location for reproduction of speech signals at local spot based on its decomposition into random signals, Proc (2010)
  • Author(s): Shouichi Takane, Koji Abe, Kanji Watan abe, Sojun Sato
  • Journal Title: International Congress on Acoustics 2010 Pages: 1-6
• [Journal Article] Sound source location for reproduction of speech signals at local spot based on its decomposition into random signals (2010)
  • Author(s): Shouichi Takane, Koji Abe, Kanji Watanabe, Sojun Sato
  • Journal Title: Proc.International Congress on Acoustics 2010 Volume: P546 Pages: 1-6
• [Presentation] 信号分解に基づく音声のスポット再生における音源配置の影響 (2012)
  • Author(s): 高根昭一, 倉冨嵩大, 安倍幸治, 渡邉貫治, 佐藤宗純
  • Organizer: 電子情報通信学会総合大会
  • Place of Presentation: 岡山大学
  • Year and Date: 2012-03-20
• [Presentation] 信号分解に基づく音声のスポット再生手法に関する一考察 (2010)
  • Author(s): 高根昭一, 安倍幸治, 渡邉貫治, 佐藤宗純
  • Organizer: 日本音響学会秋季研究発表会
  • Place of Presentation: 関西大学工学部
  • Year and Date: 2010-09-15