A stylistic analysis addressing sound and rhythm could incorporate several literary devices in which sound figures prominently, such as alliteration. Rhythm usually refers to meter.
A well-known example of a poem that uses sound and rhythm to convey meaning is "The Bells" by Edgar Allan Poe. In this poem, the speaker presents an array of different kinds of bells and systematically addresses how each type expresses different meanings.
The poem has become well known for Poe's use of sound, including his incorporation of onomatopoeia into his coinage of "tintinnabulation." Onomatopoeia is a literary device in which a word sounds like what it means. Coinage is the creation of new words.
Poe uses rhythm along with rhyme and repetition to emphasize certain sound qualities. Repetition is evident when he writes, "bells, bells, bells, bells."
He uses alliteration throughout the poem to emphasize similar sounds and meanings that are associated with the different bell types. Alliteration is the repetition of initial consonant sounds. He sometimes combines this with assonance, the repetition of vowel sounds. One example that uses both is "clamor" and "clangor."