GENERAL KNOWLEDGE

Detailed explanation-1: -Alexander Graham Bell patented the first microphone in 1876. His microphone consisted of a wire which conducted electrical direct current (DC). Audio signals were generated and received by a moving armature transmitter and its receiver, and transmission was possible from both directions.

Detailed explanation-2: -In 1877 Emile Berliner filed a patent for a microphone-the carbon microphone. Alexander Bell, who only a year before had invented the telephone, recognized the practical importance of Berliner’s technology.

Detailed explanation-3: -1876 – First Microphone Emile Berliner invented the first microphone used as a telephone transmitter. The Bell company later bought Berliner’s microphone patent for $50, 000 to improve their own telephone device.