Portable 3D Sound / Sonar Navigation System for Blind Individuals
Portable 3D Sound / Sonar Navigation System for Blind Individuals
复制标题
适用于盲人的便携式 3D 声音/声纳导航系统
DOI：
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发表时间：
2004
期刊：
影响因子：
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通讯作者：
A. Barreto
中科院分区：
文献类型：
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作者：
Daniel Aguerrevere;M. Choudhury;A. Barreto
本文描述了一种系统的开发，该系统使用便携式口袋电脑产生3D空间化声音，该系统基于探测盲人周围障碍物的多向声纳系统的读数。从用户位置到六个方向上最近的物体的距离使用六个声纳测距仪连续确定。Pocket PC利用这些信息，通过模拟六个空间化声源，创建一个3D声音环境，代表这些方向上的障碍物。声音的动态空间化是通过使用先前计算的头部相关传递函数来实现的，考虑到到障碍物的距离和人前进的方向。本文介绍了Pocket PC从声纳系统获取信号的过程，并实时创建3D声音环境，帮助盲人定位其导航环境中附近的障碍物。该系统可以方便盲人在室内环境中导航，因为它为用户提供的信息不同于使用手杖收集的信息。该系统可以同时探测用户周围所有六个方向的障碍物，即使障碍物离用户的距离比手杖覆盖的半径更远，它也可以提供障碍物的指示。
This paper describes the development of a system that uses a portable Pocket PC to generate 3D spatialized sounds, based on the readings from a multidirectional sonar system that detects obstacles around a blind person. The distances from the user position to the closest objects in six directions are continuously determined using six sonar range meters. The information is used by the Pocket PC to create a 3D sound environment that represents the obstacles in these directions through the simulation of six spatialized sound sources. The dynamic spatialization of the sounds is achieved through the use of previously computed Head Related Transfer Functions, taking into consideration the distance to the obstacles, and the direction the person is heading. The paper explains the process followed by the Pocket PC to acquire the signals from the sonar system, and the real-time creation of the 3D sound environment that would help a blind person locate nearby obstacles in his or her navigation environment. This system may facilitate the navigation of blind individuals through indoor environments, since it provides the user with information that is different from that collected through the use of a cane. This system explores the presence of obstacles in all six directions around the user simultaneously, and it can provide an indication of obstacles even if they are farther away from the user than the radius covered by the reach of the cane.