My primary and most common example is to read something and say (or write) that it "sounds familiar". Text has no sound. I'm sure there is a technical term for this practice or phenomenon. What is it?
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The technical term you're thinking of is synesthesia
...but you don't really want to say that. Your usages are simply metaphoric
Everyone does this all the time, often without realising. A blind friend of mine only occasionally registers the fact that he says "I see what you mean" as often as anyone else.
One broad classification of metaphors is into cognitive (involving thought, meaning, purpose, etc.) as opposed to perceptual (based on sense perceptions). Perceptual metaphors can be further subdivided into visual, auditory, olfactory, gustatory, tactile, etc. I'm not aware of a single term for metaphors where both the thing referenced, and the metaphor, involve different sensory inputs.