Rhyme, alliteration, assonance and consonance are ways of creating repetitive patterns of sound. His theoretical writings variously concern musical form, texture, timbre, consonance and dissonance, and harmonic perception. Context and many other aspects can affect apparent dissonance and consonance. In music, consonance and dissonance are categorizations of simultaneous or successive sounds. His research has also yielded testable predictions about the consonance and dissonance of musical sonorities. However, assonance between consonants is generally called "consonance" in American usage. Compare with consonance and dissonance in music. In musical acoustics, he noted the importance of vibration on consonance and dissonance. Intervals may be ranked by relative consonance and dissonance. The unison and octave intervals have perfect consonance. Strong brand consonance is imperative to achieving strong corporate identity. It is based on her deep understanding of the consonance of mind and spatial expressions. The same pitch outside of the imperfect consonance is not a leading tone. Another example of consonance is the word "sibilance" itself. The overall effect is one of greater consonance.