![]() ![]() Jorrison was sitting next to a harpsichord, when the pipe in his mouth accidentally rested on the harpsichord. Jorrison, an elderly German merchant, “rediscovers” bone conduction as a hearing aid. Heinicke favored “oralism,” speech and speechreading. De l’Épée favored signs as method of teaching the deaf. Samuel Heinicke (his contemporary) establishes the first public school for the deaf in Germany it is the first recognized by any government. The book proposes that deaf pupils should be taught the one handed manual alphabet, followed by articulation and only then, speaking and eventually reading and writing.Ībbé Charles Michel de l’Épée establishes the first public school for the deaf in Paris. The first book exclusively on the deaf, Reduction de las letras y arte para ensenar a ablar los mudos ( Simplification of the Letters of the Alphabet and Method of Teaching Deaf Mutes to Speak,) by Juan Pablo Bonet (1579-1633), is published in Spain. Giovanni Bonifacio (1547-1635) publishes a treatise discussing sign language, Of the Art of Signs. The hearing aids were made of wood and shaped like the ears of animals known to have acute hearing. Giovanni Battista Porta (1535-1615), an Italian physician, scientist and cryptographer, described some early hearing aids in Magia Naturalis. Spanish monk, Pedro Ponce de Leon (1520-1584), uses oral education methods to teach the deaf children of some members of the nobility, in a convent of Valladolid. Girolama Cardano (1501-1576), an Italian physician, philosopher and mathematician, writes in De Subtilitate about bone conduction of sound: how sound may be transmitted to the ear by means of a rod or the shaft of a spear held between one’s teeth. Timeline of Hearing Devices and Early Deaf Education 1551 ![]()
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