Johann Konrad Ammann (1669 – 1724) was a Swiss physician and instructor of non-verbal

deaf Deafness has varying definitions in cultural and medical contexts. In medical contexts, the meaning of deafness is hearing loss that precludes a person from understanding spoken language, an audiological condition. In this context it is written ...

persons. Johann Konrad Ammann was born at

Schaffhausen Schaffhausen (; ; ; ; ), historically known in English as Shaffhouse, is a list of towns in Switzerland, town with historic roots, a municipalities of Switzerland, municipality in northern Switzerland, and the capital of the canton of Schaffh ...

, Switzerland. After graduating at

Basel Basel ( ; ), also known as Basle ( ), ; ; ; . is a city in northwestern Switzerland on the river Rhine (at the transition from the High Rhine, High to the Upper Rhine). Basel is Switzerland's List of cities in Switzerland, third-most-populo ...

in 1687 he began to practise at

Amsterdam Amsterdam ( , ; ; ) is the capital of the Netherlands, capital and Municipalities of the Netherlands, largest city of the Kingdom of the Netherlands. It has a population of 933,680 in June 2024 within the city proper, 1,457,018 in the City Re ...

, where he gained a great reputation. He was one of the earliest writers on the instruction of the non-verbal deaf, and first called attention to his method in his ''Surdus loquens'' (Amsterdam, 1692), which was often reprinted, and was reproduced by

John Wallis John Wallis (; ; ) was an English clergyman and mathematician, who is given partial credit for the development of infinitesimal calculus. Between 1643 and 1689 Wallis served as chief cryptographer for Parliament and, later, the royal court. ...

in the ''Philosophical Transactions'' (1698). His process consisted principally of drawing the attention of his pupils to the motions of his lips and larynx while he spoke, and then inducing them to imitate these movements, until he brought them to repeat distinctly letters, syllables and words. He died at

Warmond Warmond () is a village and former municipality in the Western Netherlands, north of Leiden in the province of South Holland. The municipality covered an area of , of which is water; had a population of 4,977 in 2004. Together with Sassenheim an ...

, near

Leiden Leiden ( ; ; in English language, English and Archaism, archaic Dutch language, Dutch also Leyden) is a List of cities in the Netherlands by province, city and List of municipalities of the Netherlands, municipality in the Provinces of the Nethe ...

Notes

References

External links

* * * *
The Talking Deaf Man
', at

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{{DEFAULTSORT:Amman, Johann Konrad 1669 births 1724 deaths People from Schaffhausen 17th-century Swiss physicians 18th-century Swiss physicians