Note skin tone and gender - White Male David Hughes, in full David Edward Hughes, (born May 16, 1831, London, England—died January 22, 1900, London), Anglo-American inventor of the carbon microphone, which was important to the development of telephony. Hughes’s family emigrated to the United States when he was seven years old. In 1850 he became professor of music at St. Joseph’s College, Bardstown, Kentucky. Five years later he took out a U.S. patent for a type-printing telegraph instrument; its success was immediate, and in 1857 Hughes took it to Europe, where it came into widespread use and in some places continued in use until the 1930s. Hughes’s microphone, invented in 1878, was the forerunner of the various carbon microphones that were used in most telephones produced in the 20th century. In 1879, Hughes discovered that sparks would generate a radio signal that could be detected by listening to a telephone receiver using his new microphone design as a detector. He developed his spark-gap transmitter and receiver into a working communication system using trial and error experiments, until eventually he could demonstrate the ability to send and receive Morse code signals out to a range limited to 500 yards. https://www.britannica.com/biography/David-Hughes https://wikimili.com/en/David_Edward_Hughes https://biography.wales/article/s-HUGH-EDW-1831