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History of hearing aids. Madame de Meuron with ear trumpet. The first hearing aid was created in the 17th century. The movement toward modern hearing aids began with the creation of the telephone, and the first electric hearing aid was created in 1898. By the late 20th century, the digital hearing aid was distributed to the public commercially.
The Demant Group was founded in 1904 by Hans Demant, under the name Oticon. After his death in 1910, his son William Demant took over. [ 1] Already before World War I, Oticon increased its sales volume to cover Scandinavia and Saint Petersburg. In the twenties and thirties, a network of agents was established in Europe .
Hearing aid. In-the-canal hearing aid. Other names. Deaf aid. [ edit on Wikidata] A hearing aid is a device designed to improve hearing by making sound audible to a person with hearing loss. Hearing aids are classified as medical devices in most countries, and regulated by the respective regulations.
Sonic Corporation, founded as Sonic Drive-In and more commonly known as Sonic (stylized in all caps), is an American drive-in fast-food chain owned by Inspire Brands, the parent company of Arby's, Dunkin' Donuts and Buffalo Wild Wings. [6] Sonic, founded by Troy N. Smith, Sr., opened its first location in 1953, under the name Top Hat Drive-In. [7]
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The Ohio School for the Deaf is a school located in Columbus, Ohio. It is run by the Ohio Department of Education for deaf and hard-of-hearing students across Ohio. It was established on October 16, 1829, making it the fifth oldest residential school in the country. [ 1] OSD is the only publicly funded residential school for the deaf in Ohio.
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