Poetic sound devices are tools poets use to impart meaning or feeling through the way words sound. Some examples of poetic sound devices are alliteration, which is repetition of the initial sounds of words, and assonance, or repetition of vowel sounds.
Rhyme is also a common poetic sound device that involves ending phrases with words that end with the same sound, such as "play," "day" and "hay." Meter is similar to rhyme, but it works by forming a pattern using stressed and unstressed syllables. Both rhyme and meter work together to create flow in poetry. Onomatopoeia, another poetic sound device, is the use of words that sound like an actual sound, such as "plop," "trill" and "clang."