SAT写作经典素材之贝尔.

2017/08/06 10:28:54 编辑：浏览次数：487 移动端

　　下面为大家推荐一篇SAT写作经典素材，这篇SAT写作素材主要是介绍了电话的发明者贝尔在发明电话的过程中遇到的挫折和采取的措施以及收到的效果等。这是一个非常常见的SAT写作经典素材，下面我们来看看详细内容吧。

　　贝尔(1847～1942 )

　　Bell, Alexander Graham 1847 – 1922

　　Inventor and educator. Born March 3, 1847, in Edinburgh, Scotland. Bell is best known for perfecting the telephone to transmit vocal messages by electricity. The telephone inaugurated a new age in communication technology.

　　Bell’s father, Alexander Melville Bell, was an expert in vocal physiology and elocution; his grandfather, Alexander Bell, was an elocution professor. After studying at the University of Edinburgh and University College, London, Bell became his father&aposs assistant. He taught the deaf to talk by adopting his father&aposs system of visible speech (illustrations of speaking positions of the lips and tongue). In London he studied Hermann Ludwig von Helmholtz&aposs experiments with tuning forks and magnets to produce complex sounds.

　　In 1865, Bell made scientific studies of the resonance of the mouth while speaking.

　　In 1870, the Bells moved to Brantford, Ontario, Canada, to preserve Alexander&aposs health. He went to Boston in 1871 to teach at Sarah Fuller&aposs School for the Deaf, the first such school in the world.

　　He also tutored private students, including Helen Keller. As professor of vocal physiology and speech at Boston University in 1873, he initiated conventions for teachers of the deaf. Throughout his life he continued to educate the deaf, and he founded the American Association to Promote the Teaching of Speech to the Deaf.

　　From 1873 to 1876, Bell experimented with a phonautograph, a multiple telegraph, and an electric speaking telegraph (the telephone). Funds came from the fathers of two of his pupils; one of these men, Gardiner Hubbard, had a deaf daughter, Mabel, who later became Bell&aposs wife.

　　Key words: inventor educator

　　“我知道命运掌握在我自己的手中，我知道巨大的成功马上就要到来。”贝尔曾自信地向世界这样宣告。

　　1847 年3月3日，贝尔出生于苏格兰的爱丁堡。他的父亲是一位嗓音生理学家,并且是矫正说话、教授聋人的专家。

　　1862 年贝尔进入著名的爱丁堡大学，选择语音学作为自己的专业，贝尔通过总结父辈们的经验进步很快。

　　1869 年22 岁的贝尔受聘为美国波士顿大学语言学教授，担任声学讲座的主讲。

　　在莫尔斯电报发明后的20 多年中无数科学家试图直接用电流传递语音，贝尔也把发明电话作为自己义不容辞的责任。但由于电话是传递连续的信号而不是电报那样不连续的通断信号，在当时的难度好比登天。

　　他在实验中发现了一个有趣现象：每次电流通断时线圈发出类似于莫尔斯电码的“澳际”声，这引起贝尔大胆的设想：如果能用电流强度模拟出声音的变化不就可以用电流传递语音了吗?

　　随后的两年内贝尔刻苦用功掌握了电学，再加上他扎实的语言学知识，使他如同插上了翅膀。他辞去了教授职务，一心扎入发明电话的试验中。

　　在万事俱备只缺合作者时他偶然遇到了18 岁的电气工程师沃特森。两年后，经过无数次失败后他们终于制成了两台粗糙的样机，但不幸的是试验失败了，两人的声音是通过公寓的天花板而不是通过机器互相传递的。

　　正在他们冥思苦想之时，窗外吉他的丁冬声提醒了他们：送话器和受话器的灵敏度太低了!他们连续两天两夜自制了音箱、改进了机器。然后开始实验，刚开始沃特森只从受话器里听到嘶嘶的电流声，终于他听到了贝尔清晰的声音“沃特森先生，快来呀!我需要你!

　　1875年6 月2 日傍晚，当时贝尔28 岁，沃特森21 岁。他们趁热打铁，几经半年的改进，终于制成了世界上第一台实用的电话机。

　　以上就是这篇关于贝尔的SAT写作素材的全部内容，包括了英语和汉语两个部分的介绍。关于贝尔发明电话这样的SAT写作素材的应用是非常普遍的，所以想要突出重围有一些困难，考生要么在叙述的方式和应用的结构上做一些改变，要么就只能换一个例子来。