Sound devices in poetry are literary techniques that describe how words sound in a poem. They are also known as musical devices. Poets use sound devices to appeal to the sense of hearing and to enhance the meaning of a poem. Sound devices can occur naturally or intentionally and exemplify the difference between prose and poetic language. The following are some common types of sound devices in poetry:

1. Rhyme: This is the repetition of similar sounds at the end of words. Rhyme can be used to create a musical effect and to emphasize certain words or ideas.

2. Onomatopoeia: This is a sound device that represents the exact sound of something in the poem. The poet forms a word to imitate the sound made by the object in the poem. Onomatopoeia is a form of sound symbolism, whereby the letters represent a sound and might not be a recognizable word in the dictionary.

3. Meter: This is the pattern of stressed and unstressed syllables in a poem. It establishes the rhythm of the poem and is similar to the rhythm in music.

4. Repetition: This is the repeating of words, phrases, or sounds in a poem. Repetition can be used to create emphasis, to reinforce meaning, or to create a musical effect.

5. Alliteration: This is the repetition of the same sound at the beginning of words in a phrase or sentence. Alliteration can be used to create a musical effect and to emphasize certain words or ideas.

6. Assonance: This is the repetition of vowel sounds in words that are close together. Assonance can be used to create a musical effect and to emphasize certain words or ideas.

7. Consonance: This is the repetition of consonant sounds in words that are close together. Consonance can be used to create a musical effect and to emphasize certain words or ideas.

8. Euphony: This is the use of pleasant, harmonious sounds in a poem. Euphony can be used to create a musical effect and to create a pleasant reading experience.

9. Elision: This is the omission of a syllable or a sound in a word. Elision can be used to create a musical effect and to maintain the rhythm of a poem.

10. Dissonance: This is the use of harsh, discordant sounds in a poem. Dissonance can be used to create a jarring effect and to emphasize certain words or ideas.

Poets use these sound devices to create a musical effect, to emphasize certain words or ideas, and to convey and reinforce meaning through sound.