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The first wearable hearing aid using vacuum tube technology went on sale in England in 1936, and a year later in the United States. [5] By the 1930s, hearing aids were becoming popular to the public. [3] Multitone of London patented the first hearing aid to use automatic gain control. The same company introduced a wearable version in 1948. [1]
The first hearing aids were ear trumpets, and were created in the 17th century. Some of the first hearing aids were external hearing aids. External hearing aids directed sounds in front of the ear and blocked all other noises. The apparatus would fit behind or in the ear.
During the 1990s, the company expanded further, buying the Swiss hearing aid manufacturer Bernafon, Phonic Ear, the headset manufacturer DanaCom and Interacoustics. In 1995, the company was listed on the Copenhagen Stock Exchange. In 1997, it was decided to change the name of the company from Oticon Holding A/S to William Demant Holding A/S ...
[7] [8] In 1988, Widex produced the first digitally-programmable hearing aid with a remote control, the Quattro Q8. In 1995, Widex created Senso, the first fully digital unit that fits completely in the ear. [10] In 2004, the company created the world's first hearing aid in which right and left devices were synchronized and in 2008, the world's ...
A BTE hearing aid is a hearing aid that fits behind the ear with a tube that sends sound into the ear canal. It consists of three main parts: - The earmold (custom-made to fit the contours of your ...
Harvey Fletcher (September 11, 1884 – July 23, 1981) was an American physicist. [1] Known as the "father of stereophonic sound", he is credited with the invention of the 2-A audiometer [2] and an early electronic hearing aid.
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