Definition
A method of radio transmission in which only one of the two sidebands produced by amplitude modulation is transmitted, with the carrier and the other sideband suppressed. This concentrates all the transmitted power into a narrower portion of the radio spectrum, allowing longer-range voice communication with less power and less bandwidth than standard AM.
Plain English
A way of sending voice over radio that strips out the parts of the signal that don't carry useful information, so the remaining signal travels further and uses less of the available frequency space.
Context Anchor
Seen in radio equipment descriptions, long-range communication procedures, and aviation abbreviation lists.
Derivation
In ordinary AM radio, a voice signal produces a carrier wave with two mirror-image 'sidebands,' one above and one below the carrier frequency. Both sidebands carry the same information, so transmitting both wastes power and bandwidth. 'Single side band' simply means transmitting just one of them.
Why Pilots Care
It allows clear long-distance voice contact with lower transmitter power, essential beyond VHF range.
Grounding Statement
Picture a radio call being trimmed down so only the useful voice-carrying part is sent.
Intuition Check
SSB is not a separate frequency by itself. It is a mode of transmitting on a frequency.
Example Sentence 1
Crossing the North Atlantic, the crew switched to HF and selected SSB to make their position report to Gander Oceanic.
Example Sentence 2
Using single side band reduced power draw while maintaining readable voice quality over the ocean.