Through the use of repetition Poe is able to create to the musical melody/rhythm that unites the four parts of the poem and mimics the sounds of the bells. For example, “Keeping time, time, time” and “As he knells, knells, knells”.
The series are always four, followed by three, always beginning and ending on a stressed syllable. The meter changes to iambic in the lines with repeated "bells", bringing the reader into their rhythm. Most of the poem is a more hurried trochaic tetrameter.
