Reginald Fessenden, an electrical engineer, broadcast the first audio over radio 115 years ago tonight - Frank Beacham's Journal
![Alternator developed by Reginald Fessenden. - Science, Technology, Engineering, and Math - North Carolina Digital Collections Alternator developed by Reginald Fessenden. - Science, Technology, Engineering, and Math - North Carolina Digital Collections](https://digital.ncdcr.gov/digital/api/singleitem/image/p16062coll28/5210/default.jpg)
Alternator developed by Reginald Fessenden. - Science, Technology, Engineering, and Math - North Carolina Digital Collections
![Photograph. In 1907 Reginald Aubrey Fessenden (1866-1932) transmitted a human voice by radio for the first time. Fessenden was responsible for more th... - SuperStock Photograph. In 1907 Reginald Aubrey Fessenden (1866-1932) transmitted a human voice by radio for the first time. Fessenden was responsible for more th... - SuperStock](https://cdn.superstock.com/1895/Comp/1895-10347.webp)
Photograph. In 1907 Reginald Aubrey Fessenden (1866-1932) transmitted a human voice by radio for the first time. Fessenden was responsible for more th... - SuperStock
![The liquid "barretter", an electrolytic diode invented in 1902 by Canadian electrical engineer Reginald Fessenden, used as a radio wave detector in early radio receivers during the wireless telegraphy era Stock Photo - The liquid "barretter", an electrolytic diode invented in 1902 by Canadian electrical engineer Reginald Fessenden, used as a radio wave detector in early radio receivers during the wireless telegraphy era Stock Photo -](https://c8.alamy.com/zooms/6/b8be10b7c0924be6a9972fc396cbdda5/2dyx11m.jpg)