Paragraph on “Sound Recording” complete paragraph for Class 9, Class 10, Class 11 and Class 12

Sound Recording

In the year 1877 Thomas Edison made the first sound recording with a machine comprising of a cylinder, a stylus and a funnel. Above this cylinder was a blunt stylus connected to a flexible membrane, this in turn was connected to a ‘V’ shaped funnel. When a person spoke into the funnel, the membrane underneath vibrated thus causing the stylus to move and leave an indentation on the tin foil wrapped on the cylinder underneath. As a person spoke into the funnel, the cylinder was rotated simultaneously at a constant speed thus leaving a mark all over the foil. Taken back to the point from where the groove on the tin foil began and replayed, the same sound which had been recorded was reproduced. The basic principle of making a groove or indented mark was used to produce the first phonograph record, give sound to motion pictures and so on.