The frequencies that are produced when a signal is modulated, or changed, by another signal.
Sidebands are important in radio and telecommunications.
Examples:
The radio signal has sidebands that carry the music.
The sidebands of the signal can be used to transmit data.
I can hear the sidebands when the radio signal is not clear.
The sidebands are like the extra parts of the signal.
The sidebands make the signal sound different.
The sidebands are like the secret messages in the signal.