BASIC AND APPLICATIONAL STUDY OF MOVABLE SOUND SOURCE USING DEMODULATED SOUND BEAM DERIVED FROM AMPLITUDE MODULATED ULTRASONIC SOUND.

使用调幅超声波产生的解调声束进行可移动声源的基础和应用研究。

• 批准号: 05650328
• 负责人: YONEZAWA Yoshimichi
• 金额: $ 1.47万
• 依托单位: SHINSHU UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1993
• 资助国家: 日本
• 起止时间: 1993 至 1994
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-05650328/
• 关键词: AUDITORY DISPLAY; PARAMETRIC ARRAY; NONLINEAR ACOUSTICS; HUMAN INTERFACE; SENSORY SUPPORT; MAN-MACHINE INTERFACE; ヒューマンインタフェイス

This research aimed to support the blind on work of reading CRT.The beamed audible sound wave including voice is projected on a wall and radiated from projected point as a secondary sound wave.The vacal sentence from secondary sound source and the position are correspond to the visual sentence on the CRT.Then, the blind can recognize the sentense and the layout by their audible sense.The results of two years research about this system are as follows1. The beamed audible sound wave was simply formed by parametric array.2. The high adaptability of a electrostatic transducer was shown.3. The concaved screen was shown to be optimum for the reflecting screen by it's focal characteristics.4. The best converting system for audible sound beam was found.5. The optimum beam controlling method for the sustem was found.6. The characteristics of localization of this secondary sound sources was measured and found to be same to that of normal sound sources.7. The possibility of grasping content and layout of sentence on the CRT by auditory sense was found.

本研究旨在支持盲人阅读CRT的工作。所述包括声音的可听声波被投射到墙上，并作为次级声波从被投射点辐射出去。二次声源的空句及其位置与CRT上的可视句相对应。然后，盲人可以通过听觉识别句子和布局。经过两年的研究，本系统的研究成果如下：光束可听声波是通过参数阵列简单形成的。结果表明，静电传感器具有较高的适应性。凹面反射屏具有良好的聚焦特性，是反射屏的最佳选择。找到了可听声束的最佳转换系统。找到了系统的最佳光束控制方法。测量了该二次声源的定位特性，发现与正常声源的定位特性相同。发现了通过听觉把握CRT上句子内容和布局的可能性。

项目成果

Yoshimichi YONEZAWA,Hideki NONAKA,Kazunori ITOH,Masami HASHIMOTO :"Projective Display of Document Information by Parametric Sound Beam :" Proc.of International Conference-Computer for handicapped persons.379-384 (1994)

YONEZAWA Yoshimichi YONEZAWA，Hideki NONAKA，Kazunori ITOH，Masami HASHIMOTO：“参数声束文档信息的投影显示：”国际残疾人计算机会议记录.379-384（1994）

米沢、野中、伊東、橋本: "Projective Display of Document Information by Parametric Sound Beam" Proceedings of International Conference on "Computer for Handicapped Persons". 379-384 (1994)

Yonezawa、Nonaka、Ito、Hashimoto：“通过参数声束投影显示文档信息”“残疾人计算机”国际会议记录 379-384（1994 年）。

矢田、北川、米沢、伊東、橋本: "パラメトリックアレイビームによる空中音源" 信学技報(電子情報通信学会). EA94-37. 25-37 (1994)

Yada、Kitakawa、Yonezawa、Ito、Hashimoto：“使用参数阵列波束的空中声源”IEICE 技术报告 (IEICE) 25-37 (1994)。

Jun'ya YATA,Kazunori KITAGAWA,Yoshimichi YONEZAWA,Kazunori ITOH,Masami HASHIMOTO :"Spatial Sound Source by Parametric Array Beam :" TECHNICAL REPORT OF IEICE.EA94-37. 25-37 (1994)

Junya YATA，Kazunori KITAGAWA，Yoshimichi YONEZAWA，Kazunori ITOH，Masami HASHIMOTO：“参数阵列光束的空间声源：”IEICE.EA94-37 的技术报告。

矢田、北川、米沢、伊東、橋本: "パラメトリックアレイビームによる空中音源" 信学技報(電子情報通信学会). EA94-37. 25-30 (1994)

Yada、Kitakawa、Yonezawa、Ito、Hashimoto：“使用参数阵列波束的空中声源”IEICE 技术报告 (IEICE) 25-30 (1994)。