Recently, scientists have developed a wireless brainmachine interface that help restore communication to people who can no longer speak by reading brainwaves using electrodes(电极) stuck on their heads. Unfortunately, these have proved very slow, at roughly one word typed per minute, making normal conversations and social interactions virtually impossible.
Scientist Frank Guenther and his colleagues reveal a brainmachine interface that uses electrodes implanted directly into the brain for research into real time speech.
"It should soon be possible for extremely paralysed individuals who are incapable of speaking to produce speech through a laptop computer, " said Guenther.
The scientists worked with a 26-year- old male volunteer who experience near-total paralysis due to a stroke he suffered when he was 16. They implanted an electrode that had two wires into a part of the brain that help plan and execute movements related to speech. The electrode recorded brain signals when the volunteer attempted to talk and the wires spread them across the scalp(头皮)to help drive a speech synthesizer (合成器). The delay between brain activity and sound output was just 50 milliseconds on average, roughly the same with regular speech.
"He was quite excited, particularly on the first few days we used the system, as he got used to its properties, " Guenther recalled." I am sure the work proceeds slowly from his perspective, as it does from ours. Nonetheless, he was very excited about getting real-time audio feedback of his intended speech and happy to work very hard with us throughout the experiments."
【山西省2017高考英语二轮复习专题训练:阅读理解(6)】相关文章:
★ 【课堂新坐标】2017届高考英语(通用版)二轮复习完形填空专题训练:技法2 利用语义逻辑关系解题(含解析)
★ 2017年高考英语二轮复习精品资料:专题15 完形填空(教学案)(原卷版)
★ 2017高考四川省广安市英语阅读理解一轮系列训练:19(含解析)
★ 2017届高考英语(江苏专用)二轮复习高考单词5大记忆法课件:4.联想记忆法
★ 常熟市2014高考英阅读理解语一轮(暑假)训练题(1)及答案
★ 湖南省岳阳市2014高考英语一轮单项选择训练题(13)及答案
★ 湖南省汝城二中2014届高考英语一轮复习阅读训练 (76)
★ 2014高考英语(新人教版)一轮基础训练(18)A、B卷(附答案或解析)
最新
2017-04-24
2017-04-24
2017-04-24
2017-04-24
2017-04-21
2017-04-21