Результаты (
английский) 3:
[копия]Скопировано!
alexander graham bell(1847–1922)alexander graham bell was the inventor of the telephone. he was born in edinburgh, scotland. subsequently, the family moved to canada, and then in the united states. on education, bell was neither electrical engineer and physicist. he started as an assistant teacher and public speaking, later began to work with the people страдавшими impaired speech, those ears.bell wanted to help these people and love to the girl, оглохшей after serious illness prompted him to construct devices, by which he could demonstrate a better articulation of speech. in boston he opened a school to prepare teachers for the deaf. in 1893, alexander bell became professor of physiology of speech at boston university. he studies physics of acoustics, speech, and then started experimenting with the apparatus in which the membrane was fluctuation noises on the needle. he gradually came to the idea of a phone, which could be the possible transfer of different sounds, if can cause variations in electric current corresponding to the intensity of the fluctuations in the density of air which produces the sound.but soon the bell changes direction and goes to work on the telegraph, by which to simultaneously transmit a few texts. in the development of the telegraph accident helped bella open phenomenon, which resulted in the invention of the telephone.once in the transmitting device assistant bell pulls the record. at this time in the pit device hearing bell had a rattling. as it turns out, the замыкала and размыкала electrical circuits. this observation bell was very carefully. a few days later, the first phone device, consisting of a membrane of skin of a horn signal to enhance the sound was made. this machine is the ancestor of all the telephone sets.nevertheless, as well. mr.. bell and the other engineers in different countries, including russia, i had a lot of work, so that the telephone has become a modern appearance.
переводится, пожалуйста, подождите..