This monograph is focussed onto the sensory consonance of two simultaneous complex tones. It is intended to add weight to the hypothesis that our preference for certain two-tones (e.g., for major or minor thirds at female-singing pitch, or for perfect fifths at bass pitch) is not only due to education, but is based on the physiology of our hearing organs. The readers are expected to know biology, physics, and mathematics at high-school level. Exercises and their solutions are included at the end of most sections.weiterlesen