very rare phonoautograph model invented by scott de martinville in 1857. scientific instrument ancestor of the edison phonograph used to graphically trace sound on a paper tape. Model in excellent condition and artistic workmanship. only a few museums and collectors can boast a phonoautograph in their collections. not signed but produced in Germany at the end of the 19th century. cardboard cone diameter 35 cm length 46. diameter of the recorder cylinder 15 cm long 17. wooden base 40 x 30 cm.
source Wikipedia :Édouard-Léon Scott de Martinville is a French inventor born in 1817 in Paris where he died in 1879.Typographer and proofreader, he learned shorthand and, criticizing all existing methods, sought a mechanical means of recording speech. He invented the phonautograph, drawing curves on the paper representing sound waves; but one could not extract from these plots a text, as he had hoped, nor listen to the sound. In 2008, a team using the image from one of their recordings, made on April 9, 1860, could hear a voice singing In the moonlight. It is the earliest surviving trace of the sound of a human voice, seventeen years before Edison’s phonograph.