The Road to the Vacuum Tube Hearing Aid

As we saw last week at Hearing international, the road to a working portable electric hearing instrument involved a series of inventions such as the telephone and the carbon microphone before Miller Reese Hutchinson put the parts together and presented the world with a working electronic hearing device.  Recall that the carbon microphone was invented in 1878 and by 1896…

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The Road to the First Electric Portable Hearing Aid….and Beyond

Fought between 1861 and 1865 over the issue of slavery, the American Civil War was one of the bloodiest wars ever, with 620,000 soldiers losing their lives on both the Union and Confederate sides. Since the Confederacy lost the war, life in the southern part of the United States was difficult in the post War days. As the…

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