An early type of vacuum tube (electronic component) developed in the early 1900s that could amplify weak electrical signals, especially important in early radio and audio technology.
From Latin 'audire' (to hear) + the suffix -on (particle or unit). It was named to suggest it was the fundamental unit for hearing or audio amplification.
Lee de Forest invented the audion in 1906, essentially creating the grandfather of the transistor—without it, there would be no radio broadcasts, no telephone amplifiers, and no modern electronics as we know them. It's why he's called the 'Father of Radio.'
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