Development of sound source for remote conference and remote education using focused parametric array sound field

利用聚焦参量阵列声场开发远程会议和远程教育声源

• 批准号: 15300275
• 负责人: YONEZAWA Yoshimichi
• 金额: $ 10.05万
• 依托单位: Shinshu University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2003
• 资助国家: 日本
• 起止时间: 2003 至 2005
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-15300275/
• 关键词: Remote conference; Remote education; Privacy sound; Directional speaker; Parametric array; Sound pollution; 受聴者散乱; 遠隔教育; 遠隔会議; 指向性音場; スピーカ; ビーム音波; 受講環境; ヘッドホンレス

A sound system for remote conferences and remote education using a high directional sound field that uses an effect of parametric array was examined. The conventional remote systems through the Internet use a normal speaker for a conference and conventional head phones for education, and there are many problems such as leak of information of conference, noise pollution and acoustic feedback. We tried to delete these problems by use of high directional sound field, made by parametric array effect.First a focused and integrated parametric array sound source was made and adjustability for the purpose was examined. As a result, the sound properties were shown to be adaptive to voice sound. And then, the sound system was combined with a screen to realize a remote conference system.This system was evaluated at the real field of remote conference and remote education. However, We found out some problems. One problem is that the system is not adaptive to music source. And another problem is an additional sound pressure to surrounding area because the head of the listner scatters the received sound.In conclusion, The system is useful for remote conferences and education in the case of a normal sound source such as human voice and comparably low frequency sound.

研究了一种利用参数阵列效应的高定向声场用于远程会议和远程教育的音响系统。传统的互联网远程系统使用普通扬声器进行会议，使用常规耳机进行教学，存在会议信息泄露、噪声污染和声反馈等问题。我们试图利用参数阵效应产生的高方向性声场来消除这些问题。首先制作了聚焦集成参数阵列声源，并对其可调性进行了测试。结果表明，声音属性是自适应的声音。然后，将音响系统与屏幕相结合，实现远程会议系统。该系统在实际的远程会议和远程教育领域进行了评估。然而，我们发现了一些问题。其中一个问题是系统对音乐源的适应性不强。另一个问题是周围区域的额外声压，因为听者的头部会分散接收到的声音。综上所述，该系统适用于人声等正常声源和较低频率声音的远程会议和教育。

项目成果

泉谷敬, 米澤義道, 他3名: "音声指示に用いる空中音源の音質改善(参考)口頭発表"日本ME学会甲信越支部長野地区シンポジウム(2004,02,13).

Takashi Izumiya、Yoshimichi Yonezawa 等 3 人：“提高用于语音指令（参考）口头演示的空中声源的音质”日本 ME 协会甲信越支部长野地区研讨会（2004,02,13）。

遠隔受講用指向性個人音源の最適設計

远程学习定向个人声源优化设计

• 发表时间: 2006
• 期刊: 第4回生体医工学会甲信越支部長野地区シンポジウム講演論文集
• 作者: 森大樹;海上秀徳;金子浩昌;米澤義道;伊東一典;橋本昌巳
• 通讯作者: 橋本昌巳

パラメトリックアレー効果を用いた遠隔会議用個人音源

使用参数阵列效果的远程会议个人声源

• 发表时间: 2005
• 期刊: 計測自動制御学会中部支部シンポジウム講演論文集p.64
• 作者: 森大樹;海上秀徳;金子浩昌;米澤義道;伊東一典;橋本昌巳
• 通讯作者: 橋本昌巳

An additional local sound field for the heard of hearing

为听者提供额外的本地声场

• 发表时间: 2005
• 期刊: Proc.6^<th> Asian-Pacific Conference on Medical and Biological Engineering CDROM
• 作者: H.Mori;Y.Yonezawa;Kazunori Itoh;M.Hashimoto
• 通讯作者: M.Hashimoto

眞壁徹, 米澤義道, 他3名: "収束パラメトリックアレー効果による音波ビーム(参考)口頭発表"第17回日本エム・イー学会秋季大会YSO2-3(2003,10,20).

Toru Manakabe、Yoshimichi Yonezawa 等 3 人：“通过汇聚参量阵列效应进行声波束（参考）口头演示”第 17 届日本 MEE 学会秋季会议 YSO2-3（2003,10,20）。