Miller Reese Hutchison

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Dr. Miller Reese Hutchison (born August 6, 1876, died February 16, 1944) was an American inventor at the Edison Laboratory. ^[1] ^[2] He was the inventor of the first electrical hearing aid in 1902, which he called the Acousticon; one of the first eavesdropping devices, the dictograph; and the Klaxon horn. Many years later the St. Louis Post-Dispatch published an editorial (in recognition of the anniversary of one or the other of these inventions) suggesting that he invented the Klaxon horn to increase the number of candidates for his Acousticon Hearing Aid. His Acousticon Hearing Aid was an electrical analog of the Ear Trumpet, where he used a large carbon microphone to capture the acoustic input and deliver it to a small carbon "receiver", which in turn delivered its output to the ear.