Harvey Fletcher (September 11,1884-July 23,1981) was an American physicist, known as "the father of stereophonic sound", and credited with the invention of the hearing aid and the audiometer.
He was credited with the invention of the hearing aid and the audiometer. Harvey Fletcher (September 11,1884-July 23,1981) was an American physicist.
Harvey Fletcher (September 11,1884-July 23,1981) was an American physicist. He was credited with the invention of the hearing aid and the audiometer.
Harvey Fletcher (September 11,1884-July 23,1981) was an American physicist. He was credited with the invention of the hearing aid and the audiometer.