Final answer:
The regular chord progression frequently used in doo-wop songs is known as the 12-bar blues or '50s progression, which establishes a pattern creating the genre's characteristic rhythm and repetition.
Step-by-step explanation:
The chord progression that is commonly heard in many doo-wop songs is referred to as the 12-bar blues or the '50s progression. This progression uses a pattern of chords that creates a familiar and comfortable rhythmic foundation for the song. The repetitive nature of this chord structure produces a rhythm and repetition or a pattern that is easily recognizable and often associated with the doo-wop genre. This regularity in chord progression at a consistent rhythmic rate helps to establish the characteristic sound of doo-wop music, giving it a smooth, swaying feeling that listeners can easily follow.
Patterns in music are a lot like patterns in the visual arts; they are based on the systematic arrangement of repeated shapes or forms. The pattern created by the regular chord progressions in doo-wop forms a sort of musical rhythm that provides a foundational structure and aesthetic appeal. This facilitates an engaging and pleasant auditory experience, akin to the lyric or syncopated visual effect that helps to carry the pattern in other forms of art.