Clausen's most popular harmonies are mostly based on close dissonances such as the major and minor second. These chords based on dissonance are also called "tone clusters". His style is sometimes classified as Neo-Romantic but this term can mean many things.
Clausen's most well-known musical arrangements frequently utilize harmonies that rely heavily on dissonances, particularly major and minor seconds. These chords based on dissonance are also referred to as "tone clusters." His style is sometimes categorized as Neo-Romantic, but this label can be quite broad and encompass a range of interpretations.