LAW of ENTRAINMENT REQUIRES that two resonances or vibrations existing in the same location MUST adjust and combine to have a single resonance.
In 1665, Dutch Scientist Christian Huygens described something which is now called the law of entrainment. This law holds that if two or more rhythms are in close proximity, they will always fall into synchrony (or, as we say using slang, get in synch). Huygens observed that pendulum wall clocks, when placed next to each other, would become “entrained” and beat in sync with each other. This law holds true for all types of rhythms: biological, celestial, mechanical, musical, etc.