BARBARA KLEIN:

I'm Barbara Klein.

STEVE EMBER:

And I'm Steve Ember with PEOPLE IN AMERICA in VOA Special English. Today, we will tell about several men who influenced the development of radio.

BARBARA KLEIN:

Some people say radio was invented by Guglielmo Marconi of Italy. Marconi sent the first radio communication signals through the air in 1895. In fact, no one person can be called the inventor of radio. Many people, including several Americans, helped to develop radio. You may not know their names. However, their work affected many people.

Over the years, radio has become one of the most important forms of communication. It can be used for two-way communication, such as between a ship and land. Scientists even use radio to communicate into space. And radio broadcasts let people send words, music and information to any part of the world.

STEVE EMBER:

The first experimental radio broadcasts in the United States were made in the early 1900s. One of the first broadcasts came from the Metropolitan Opera House in New York City in 1910. It included music by the great singer Enrico Caruso. An American inventor, Lee De Forest, produced that broadcast.

Only a few people could hear the broadcast. Some were people in the New York area who had built radio receivers. Some ships at sea and military radio stations received the broadcast. Many newspapers of the day reported on the event. The name of Lee De Forest became part of broadcasting history.

BARBARA KLEIN:

De Forest developed some of the technology used in early radio. During his lifetime, he invented hundreds of devices that were used in telephones, shortwave radio broadcasts, and similar technology.

His most famous invention was the vacuum tube, or electron tube. In 1906, the electron tube was considered the single most important development in electronics. The device made it possible to strengthen radio signals and to send them over long distances. It was a major reason for the fast growth of the electronics and communications industries in the early part of the 20th century.

STEVE EMBER:

Edwin Armstrong was another American inventor who was important in the development of electronics and radio communication. Armstrong developed technology that helped to improve radio reception. He discovered ways to limit unwanted radio signals. Edwin Armstrong also was a leader in using radio to reproduce sounds clearly. This process became known as frequency modulation, or FM radio. FM radio provided better sound reproduction and less noise or interference than traditional AM radio. Armstrong also developed radio receivers that became widely used.

(MUSIC)

BARBARA KLEIN:

Many experts say station KDKA in Pittsburgh, Pennsylvania was the first American radio station. It broadcast results of the American presidential election in November, 1920. That is generally considered the start of professional radio broadcasting in the United States.

Soon, radio stations began to appear in other areas. In 1922, two stations in New York State joined together to broadcast the championship game of American baseball. The stations were connected by telephone lines. This permitted them to share the same program. It was one of the first examples of a radio network.

STEVE EMBER:

By the middle of the 1920s, there were two main radio networks in the United States. The National Broadcasting Corporation, NBC, was formed by the Radio Corporation of America. NBC became the first permanent national network. The other network was the Columbia Broadcasting System, called CBS. The networks provided programs to radio stations across the country. Local stations created very few programs. What listeners heard in New York was often heard in Los Angeles, California and other cities.

BARBARA KLEIN:

David Sarnoff was the man responsible for NBC. As a young man, Sarnoff had taught himself Morse code. He got a job with the Marconi Wireless Telegraph Company where he worked as a telegraph operator. He was on duty when the passenger ship Titanic sank in the Atlantic Ocean in 1912. Sarnoff helped the rescue effort by informing other ships about the accident. He understood that someone using radio could affect many lives. By 1921, Sarnoff was an official of the Radio Corporation of America. He pushed RCA to enter broadcasting. The company soon earned huge profits. Five years later, David Sarnoff helped create NBC. David Sarnoff developed the theory of broadcasting.

This was very different from the communication between two people speaking to each other on a telephone. Radio meant that someone could speak to millions of people.

(MUSIC)

STEVE EMBER:

William S. Paley developed another radio network. In 1928, Paley left his family's business. He spent several hundred thousand dollars on several radio stations. These stations became known as the Columbia Broadcasting System. Paley's friends and advisers told him that he had made a huge mistake. They said his dream of building a large and important radio network would never come true. Paley did not listen to them. Instead, he went to see the heads of some of the largest American companies to get their financial support for his network.

Then, Paley searched for the best people he could find to produce the radio shows and news programming he wanted. He paid them well. William Paley was always looking for people with special skills. One night, he attended a show by the popular Tommy Dorsey Band. A young man with the group sang during the performance. His name was Frank Sinatra. Sinatra soon had his own program with CBS, Paley's radio network.

(MUSIC)

BARBARA KLEIN:

Radio was extremely popular in the United States between the late 1920s and the early 1950s. This period is known as the Golden Age of Broadcasting.

During this period, families gathered in their living rooms every night to listen to radio shows. Children hurried from school to hear shows created for them. In the daytime, millions of women listened to radio plays called soap operas. They were called soap operas because companies that make soap paid for the shows.

STEVE EMBER:

Radio influenced the way many people felt about their community and the world. It permitted them to sit at home and hear what was happening in other areas. During World War Two, people could hear the voices of world leaders, such as American President Franklin Roosevelt.

FRANKLIN ROOSEVELT: "When the dictators -- if the dictators -- are ready to make war upon us, they will not wait for an act of war on our part. They did not wait for Norway or Belgium or the Netherlands to commit an act of war."

BARBARA KLEIN:

Listeners also could hear the voices of reporters covering World War Two. Edward R. Murrow became famous for reporting about the war. People sometimes could hear guns and bombs exploding during his report.

EDWARD R. MURROW: "The plane is still very high and it's quite clear that he's not coming in for his bombing run...Earlier this evening we could hear occasional—again, those were explosions overhead. Earlier this evening, we heard a number of bombs go sliding and slithering across, to fall several blocks away."

STEVE EMBER:

In 1937, Edward R. Murrow was the only representative of CBS in Europe. Murrow built a team of news reporters whose names would become well known to listeners. Murrow and reporter William Shirer made broadcasting history in 1938. They organized a special broadcast with European reaction to the seizure of Austria by Nazi Germany. The show had reports from London, Berlin, Paris and Rome. It was a huge success.

BARBARA KLEIN:

In the United States, the rise of television in the 1950s ended the Golden Age of Radio Broadcasting. More and more people started to watch television. Most of the popular shows disappeared from radio.

Many people believed television would cause radio broadcasting to become unimportant. However, the number of radio listeners continues to grow. Most experts say radio will continue to be important during this century.

STEVE EMBER:

This program was written by George Grow. It was produced by Caty Weaver. I'm Steve Ember.

BARBARA KLEIN:

And I'm Barbara Klein. Join us again next week for PEOPLE IN AMERICA in VOA Special English.

slither: to move somewhere in a smooth, controlled way, often close to the ground 滑行；蛇行；爬行

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(来源：VOA 编辑：陈丹妮）