Carbon Transmitters are used in telephone handset. It is constructed by placing carbon granules between metal plates known as electrodes. One of the metal plates is a thin diaphgram. It takes vibrations in pressure caused by sound waves and transmits these vibrations to the carbon granules.
The vibrations produced give pressure to carbon grains. As a result of it, the electric current flows through the grains and copies the voice. The electric copy of the person’s voice, who has called up flows through a wire , producing vibrations in the magnetic field of an electromagnet.
Due to the vibrations, permanent magnet vibrates a diaphgram which generates sounds similar to the caller’s voice. Through Alexander Grahem Bell, a Scottish inventor invented telephone, it was Thomas Edison who introduced carbon transmitter and thus improved upon Grahams Bells Telephone.
