Rhythmic structures refer to the patterns of sounds and silences in music and poetry. They are created by varying the duration, intensity, and timing of notes or syllables. These patterns help establish the pace and mood of a piece, making it more engaging and memorable. In music, rhythmic structures can include elements like beats, measures, and time signatures. In poetry, they often involve meter and rhyme schemes. Both forms utilize rhythmic structures to enhance expression and create a sense of flow, allowing audiences to connect more deeply with the work.