Dr. A. True Ott was explaining his health research into minerals, and the health effects of frequencies on this program (The Corporation Nation, 8 October 2014).
He relates this subject to the fundamental Schumann resonance (approximately 8 Hz).
A website he mentioned omega432.com contains historical and technical detail from a different perspective on 432 Hz.
It may be worth investigating this topic, considering the amount of music we listen to. From what I understand, 440 Hz was imposed on us in the mid twentieth century in the same way that many other things are imposed on us.