In the field of understanding music from a macro perspective, the most representative theory is the "Gestalt" theory of cognitive psychology, that is, Gestalt psychology. In his book "Principles of Gestalt Psychology", Kurt Koffk proposed new concepts such as "behavioral field", "environmental field", "physical field", and "psychological field": " The reason why things look the way they do is related to the distribution of close stimuli causing the corresponding field organization." Then, Kofka used the tuning fork to produce different vibrations in different environments to illustrate people's reception of sound. Differences occur because of different fields. In a soundproof box, in water, or on an iron frame, the sound generated by the vibration of the tuning fork propagates at different speeds, which results in people's perception of the sound being different. Kofka tried to use this experiment to illustrate an important theory in Gestalt psychology-the homology of mind and body. This theory believes that feelings and objects (mind and matter) are a whole, and the whole cannot be separated, so the sum of the parts is not the whole. The unity between mind and matter is "mind and matter are of the same type"; the relationship between mind and matter is stimulation and reaction.