I'm trying to reconcile the physical meaning of frequency/vibrations with the metaphysical meaning.
Physically, frequency is cycles per second or Hertz. I deal with angular frequencies as well. The frequency of a musical note is the cycles of excitation/movement per second of the air when the sound (elastic waves) propagates. The acoustic piano has a range of fundamental frequencies of 27.5 Hz to 4186 Hz. HArmonics are multiples of the fundamental frequency.
Metaphysically, the masters describe high/spiritual) vibrations and low (materialistic) vibrations, but it is not well specified what vibrates. The string, the reed, and the air vibrate in a musical instrument. In an earthquake, the ground vibrates. In the astral or causal realms, I wouldn't know.
It has taken since 1687 for scientists to detect gravity waves. How long will it take before they detect frequency waves emitted by human beings?
2015
In 2015, scientists detected gravitational waves for the very first time. They used a very sensitive instrument called LIGO (Laser Interferometer Gravitational-Wave Observatory). These first gravitational waves happened when two black holes crashed into one another. The collision happened 1.3 billion years ago.
https://spaceplace.nasa.gov/gravitational-waves/en/#:~:text=In%202015%2C%20scientists%20detected%20gravitational%20waves%20for%20the,another.%20The%20collision%20happened%201.3%20billion%20years%20ago.
