- 1800: The first company to manufacture hearing
aids on a commercial basis is established. The company manufactures
hundreds of different hearing aids, most of which are tubes and
trumpets in limited numbers.
-
- 1892: The first patent for
an electrical hearing aid is filed. Other patents follow, but
none of these ever reach production. The first hearing aid is
produced - an earphone connected to a carbon microphone fastened
on a battery box. During this time, Alexander Graham Bell has
also been mentioned as the person who built the first earphone
for amplifying sound for the hearing impaired. But, he never
filed a patent for what was possibly the "first hearing
aid".
-
- 1895: A simple telephone arrangement
is built at a "Deaf and Dumb Asylum".
-
- 1899: This is when the first
commercially manufactured hearing aid becomes available. This
table-model instrument is made of carbon, and costs $400.
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