Think about your answer, then reveal below.
Model answer: Sound devices create acoustic patterns that can mirror or intensify the sense of the words. Slow, open vowels (assonance with long sounds) can enact languor or grief; clustered hard consonants can enact violence or urgency. When the sound of a line performs what the line describes, the meaning is felt as well as understood.
This is the principle of sound iconicity — the idea that sound can enact sense. A line about the sea might use repeated /s/ and soft fricatives to mimic the sound of waves; a line about a hammer might cluster stops (/p/, /t/, /k/, /b/, /d/, /g/). When analyzing sound devices, always ask whether the acoustic effect reinforces, contrasts with, or ironizes the semantic content.