Johann Conrad Amman

Born in Schaffhausen, Switzerland, Johann Konrad Ammann studied medicine at the University of Basel and later settled in Amsterdam, where he built a strong reputation as a physician. Alongside his medical practice, he became especially interested in how deaf people could be taught to speak.

He is best remembered for Surdus Loquens and Dissertatio de Loquela, works that described methods for training deaf students through observing lip movements and the position of the tongue. Those books made him an important early figure in the history of deaf education, even though later educators would debate and revise his methods.

Ammann died in 1724, but his name has remained tied to the beginnings of oral instruction for deaf learners. His career stands at an unusual meeting point of medicine, language, and education.