onomatopoesy means the use of onomatopoeia.
Etymology
From Ancient Greek ὀνοματοποιία (onomatopoiía, “the coining of a word in imitation of a sound”).
noun
- The use of onomatopoeia.“Another means is the imitation of sounds by the organ of speech, constituting onomatopoesy , e.g., the hissing of a stream, the roll of thunder, the tumult of a storm, whistling, etc.”