audion
audion — noun
1. an early type of vacuum tube with three electrodes inside, used in the first rad
an early type of vacuum tube with three electrodes inside, used in the first radios to make weak signals stronger
Emiko found an old audion inside her grandfather's wooden radio cabinet.
The audion made it possible to hear voices across the Atlantic for the first time.
pattern: made it possible to + verb for historical impact
Diego replaced the broken audion in the laboratory's signal amplifier.
Before the audion, radio receivers could only pick up Morse code dots and dashes.
Engineers at the station used a single audion to boost the weak broadcast signal.
- triode
the generic technical term for any three-electrode vacuum tube; 'audion' is the original trade name
- vacuum tube
broader category that also includes diodes, tetrodes, and pentodes
- valve
British English equivalent of vacuum tube, used across all types
用法筆記
Historical term; refers specifically to Lee De Forest's original three-electrode design from 1906, not to later vacuum tubes in general.