Which term describes the ability of a receiver to discriminate between multiple signals?

Selectivity is the ability of a receiver to tune into one specific desired signal while rejecting other signals that are on adjacent or nearby frequencies. If you are listening to a station and hear interference from another station right next to it on the dial, your receiver is struggling with selectivity. A radio achieves good selectivity through the use of high-quality filters that block out unwanted frequencies. Think of it as 'selecting' only the conversation you want to hear in a crowded room. The term 'Discrimination ratio' is a distractor made up to sound plausible, while 'Sensitivity' is the ability to hear faint signals, not to separate them. Harmonic distortion relates to audio quality degradation.