Information about Alexander Graham Bell

The inventor of the telephone was alexander bell, an Englishman. Bell was born into an acoustic family in England and later moved to America. In Boston, a school has increased the number of deaf teachers. For professional reasons, he studied the physiological functions of listening and speaking. Later, he was hired as a professor of sound physiology at Boston University. 1873 resigned as a professor and began to concentrate on the research and development of telephones. To develop the telephone, we must first turn the sound signal into an electrical signal, and then turn the electrical signal into a sound signal. Before Bell, many people had been studying this problem. 1875, Bell was inspired by the application of electromagnets in telegraphy, which can convert electrical signals and mechanical movements. Bell began to design electromagnetic telephones. He first put a tuning fork in front of a coil with an iron core. The vibration of the tuning fork causes the iron core to move correspondingly, resulting in induced current. The current signal is transmitted to the other end of the wire and converted into a sound signal. Later, Bell changed the tuning fork into a metal piece that can vibrate with the sound, and changed the iron core into a magnetic rod. After repeated experiments, a practical telephone device was made. 1876, Bell obtained the telephone patent in the United States. He not only invented the telephone, but also established the first telephone company in the world.

There is also a saying that

The "father of the telephone" is not Bell who has always been recognized as the "father of the telephone". Xinhua/AP According to the Daily Telegraph of 65438+February 1 Sunday, it is well known that Alexander Graham Bell, who was born in Scotland and later immigrated to the United States, was the inventor of the world's first telephone, and he was awarded the title of "the father of the telephone". However, the latest declassified documents reveal that the inventor of the world's first telephone was not Bell at all, but a German science teacher named Philip Rice. The British telephone company discovered the secret 50 years ago, but kept it secret for commercial interests. According to John Li Fen, curator of the London Science Museum, he found the secret in the old documents of the museum. Newly discovered documents show that as early as 1947, shortly after the end of World War II, engineers of Standard Telephone and Telegraph Company (stc) tested a series of ancient telephones, some of which were invented long before Bell, the "father of telephone", invented the first telephone. The experimental results show that a telephone device invented by German science teacher Philip Rice can be used completely, and this kind of telephone was invented in 1863, and the first telephone in Bibel came out 13 years earlier. Scientists have found that although the sound transmitted by this mobile phone is very weak, it can work. Therefore, the earliest inventor of the telephone was neither Bell nor Edison!

However, there is still debate in academic circles about who is the real inventor of the telephone. Many books have recorded that this man named Bell turned the propagation of sound by current into reality in March 1876. Since then, humans have had the first telephone.