Microphone, also known as "microphone", is an ancient practical entertainment tool, which was first invented by China people and was the original prototype of telephone.
"Microphone" is an ancient practical entertainment tool, which was first invented by China people. It is the original prototype of the telephone and has made great contributions to the communication and entertainment between people. Microphone is simple to make, two round cartons, a cotton thread and two sticks can be easily made.
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The history of telephone invention
1On June 2, 875, Bell, the "father of the telephone", made the first call with his assistant Watson through an experimental device invented by himself. Watson in the other room jumped out and shouted, "I hear Bell calling me!" " "This scene was recorded in Bell's experimental notes and kept in the Library of Congress. It is recognized in history that this day is the invention day of the telephone.
The following year, 1876, this telephone device appeared at the Philadelphia World Expo, which surprised visitors. Bell went to the live demonstration, and the prince of Brazil was there. When the prince picked up the phone and heard Bell's voice coming from another room, he said in surprise, "My God! This steel thing can actually talk! " ?
Because of his success in Philadelphia, Bell soon had the opportunity to show his invention to Queen Victoria of England, who used the word "unusual" to describe the sound transmission device. 1876 On February 4th, Bell applied for a telephone patent from the United States Patent Office. On March 3rd, his 29th birthday, the patent was approved.
But at that time, the performance of Bell telephone was not perfect, the volume was weak and the sound was distorted. 1875, Edison was invited by Western Union Company to improve it. 1877, Edison obtained the patent of carbon particle microphone. 1878, this new microphone was unveiled at the Paris World Expo. Bell also introduced long-distance calls. 1904, wireless phones appeared at the St. Louis World Expo.
1964, the videophone displayed at the new york World Expo realized the dream of hearing voices and seeing people when speaking. 19 15 At the Panama World Expo, Bell connected the intercontinental telephone before the opening.
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China Net-1875 February 14 Bell obtained the telephone patent.