Support system for handwriting for the blind using a virtual auditory screen by head related transfer function

我国盲人人口约为33万，老龄率每年都在上升。最近。由于交通事故和白内障、糖尿病性视网膜病变等疾病，非先天性失明人数增加。老年后习盲人学习盲文是困难的。然而，他们仍然希望像视力正常的人一样阅读印刷字体、书写字母和画画。视力正常的人在写字、画图形时，会无意识地使用视觉反馈。如果他失去了反馈，他就不能在纸上正确的位置上写出正确的字符。因此，视障人士可以通过使用帮助他们正确书写的声音信息反馈来书写汉字。在本研究中，我们尝试通过一种新的空间听觉显示来改善我们的辅助系统，帮助后天性盲人书写和绘制图形。手写模式可以通过耳机在虚拟听觉屏幕上表达。在这个系统中，笔在平板上的位置被转换成一个点声图像，并通过声音定位的因素合成。利用声像定位的实验因素，设计了一种新的虚拟听觉屏。我们还研究了使用新的支持系统手写和绘图的可能性。我们还研究了使用新的支持系统手写和绘图的可能性。作为实验结果。实验结果表明，该系统对外来者盲人书写文字和绘制图形有一定的帮助。

The population of the blind is about 330,000 in our country and the rate of the aged rises every year. Recently. the number of adventitious blind is increased by traffic accidents and diseases such as cataract and diabetic retinopathy. It is difficult for the aged acquired blind to learn Braille. However, they still want to read printed type, write letters and draw pictures as sighted people do.When a sighted person writes characters and draws figures, he unconsciously uses the visual feedback. If he lost feedback, he could not write characters properly formed in the correct position on the paper. Accordingly, the visually handicapped persons may be able to write characters by using a sound feedback of information which helps them to write correctly.In this research, we try to improve our support system which helps an acquired blind to write characters and to draw figeres by using a new spatial auditory display. Handwriting patterns can be expressed on a virtural auditory screen perceived with headphones Listening. In this system, a pen position on the tablet is converted into that of a point sound image which is synthesized by the factor of sound localization. A new virtual auditory screen is designed by the experimental factors of sound image location. We also examine the possibility of handwriting and drawing by using a new support system. We also examine the possibility of handwriting and drawing by using a new support system. As the experimental results. It is shown that this systems is helpful when the adventitious blind write characters and draw figures.