Definition
The process of increasing the strength of an electrical signal. In aviation electronics, an amplifier takes a small input signal and produces a larger output signal of the same form, using power drawn from a separate source.
Plain English
Making a weak electrical signal stronger so it can drive a speaker, instrument, or other device.
Context Anchor
Seen in avionics, radio, intercom, audio panel, and instrument system discussions.
Derivation
From the Latin amplificare, meaning 'to make larger.' In electronics, the word kept its plain sense — making something bigger — applied specifically to signals.
Why Pilots Care
Clear radio reception depends on adequate amplification; weak signals can cause missed instructions and safety issues.
Analogy
Like turning up the volume knob on a speaker so a quiet voice becomes easy to hear.
Intuition Check
Amplification does not mean adding new information to a signal. It means increasing the strength of the signal that is already there.
Example Sentence 1
The audio panel provides amplification so that the weak signal from the radio receiver is loud enough to hear in the headset.
Example Sentence 2
Low battery voltage reduced amplification in the audio panel, making headset communications difficult to understand.