Technology
Early hearing aids were giant brass ear trumpets
HERE’S THE INTERESTING PART
If you were hard of hearing in the 18th century, your best technological option was strapping a massive brass tuba to your skull. Ear trumpets didn't amplify sound electronically; they simply funneled massive amounts of acoustic waves straight into your ear canal. They were terribly ineffective, constantly required you to aim your head at the speaker like a radar dish, and looked absolutely ridiculous.
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