VOA慢速英语2015 新技术让我们听到19世纪80年代著名的声音（在线收听）

AS IT IS 2015-03-11 New Technology Lets Us Hear Famous Voice from 1880s 新技术让我们听到19世纪80年代著名的声音

Today, March 10th, is the anniversary of the first successful telephone call. Alexander Graham Bell was one of the inventors of the telephone. He completed that first call 139 years ago. He also played an important part in creating sound recordings. The National Museum of American History in Washington, D.C. recently opened an exhibition that plays sounds recorded by Mr. Bell in the 1880s. 

“This record has been made by Alexander Graham Bell…”

That is the only confirmed audio recording of Alexander Graham Bell's voice. He says: “This record has been made by Alexander Graham Bell…”

The wax and cardboard disc recording was made in 1885. It captured the inventor’s words as he recited numbers for about four minutes. This is how he ended the recording:

“…in witness whereof, hear my voice, Alexander Graham Bell.”

Carlene Stephens is the curator of the exhibit, which is called “Hear My Voice.”

“We had a paper transcript signed by him with what was on the recording. When we finally heard the voice, it was quite thrilling.”

The experimental recordings were made using different techniques and materials. The materials include wax discs and glass discs.

Peter Alyea is a digital conversion specialist at the Library of Congress. He and two other scientists discovered the recordings about two years ago. He used a special device to play the sound from a disc or a cylinder record. It does so without touching the surface.  

“The imaging system takes a picture of the surface of the media.  These images are pictures of grooves that move in certain ways, and that motion contains the sound. That digital image can then be processed by a piece of software and turns them into sound.”

Carlene Stephens says the Smithsonian hopes to use the system to play sounds from its collection of 500 early recordings. She believes the next generation of inventors will be inspired by them.

Words in This Story

disc – n. a flat, thin, round object that is used to store information

exhibition – n. a public show of something, such as a work of art

recite – v. to say or describe a series or list of things