Who invented the carbon microphone and in which year?

The carbon microphone, which significantly improved the quality and efficiency of sound transmission in telecommunication, was indeed invented by Thomas Edison in 1877. This invention was pivotal in the development of telephony, as it allowed for the amplification of sound, making it possible to transmit clearer audio over long distances.

Edison’s design utilized carbon granules that changed their resistance with sound vibrations, converting voice into electrical signals effectively. This breakthrough was critical for the early telephone systems and enabled more reliable and clearer communication compared to previous technologies. The invention played a foundational role in the advancement of audio and communication technology, marking a significant milestone in the history of innovation.