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Ear trumpet. An ear trumpet is a tubular or funnel-shaped device which collects sound waves and leads them into the ear. They are used as hearing aids, resulting in a strengthening of the sound energy impact to the eardrum and thus improved hearing for a deaf or hard-of-hearing individual. Ear trumpets were made of sheet metal, silver, wood ...
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 natural trumpet was probably first used as a military instrument in Ancient Egypt. The trumpets depicted by the artists of the Eighteenth Dynasty were short straight instruments made of wood, bronze, copper or silver. According to the Classical writers, the Egyptian trumpet sounded like the braying of an ass.
Returning to Vienna, he gave his attention to the construction of an automaton trumpeter, which, with lifelike movements and sudden changes of attire, performed French and Austrian field signals and military airs. In 1808 he invented an improved ear trumpet, and a musical chronometer. In 1813 Maelzel and Beethoven were on familiar terms.
Chester Greenwood. Chester Greenwood (4 December 1858 – 5 July 1937) was an American engineer and inventor, known for inventing the earmuffs in 1873. [1] He reportedly came up with the idea while ice skating and he asked his grandmother to sew tufts of fur between loops of wire. [2] His patent was for improved ear protectors.
ICD-9-CM. 96.01. [edit on Wikidata] In medicine, a nasopharyngeal airway (NPA), nasal trumpet (because of its flared end), or nose hose, is a type of airway adjunct, a tube that is designed to be inserted through the nasal passage down into the posterior pharynx to secure an open airway. It was introduced by Hans Karl Wendl [de] in 1958. [1]
Kansas City, Missouri, U.S. Died. December 7, 2012. (2012-12-07) (aged 89) Aurora, Oregon, U.S. Known for. inventing cochlear implant. William Fouts House (December 1, 1923 – December 7, 2012) was an American otologist, physician and medical researcher who developed and invented the cochlear implant. [1][2] The cochlear implant is considered ...
The phonautograph was invented on March 25, 1857, by Frenchman Édouard-Léon Scott de Martinville, [13] an editor and typographer of manuscripts at a scientific publishing house in Paris. [14] One day while editing Professor Longet's Traité de Physiologie , he happened upon that customer's engraved illustration of the anatomy of the human ear ...