There are a multitude of sound frequencies present at all times. It is the foundation of the harmonic convergences that forms Matter. Our consciousness of them varies according to awareness of them. One can mediate on these sounds and as one attunes with them they become aware of the variety of tones that are layered upon each other.

My logical mind said maybe it is just the hum of the electromagnetic frequencies all around me the thing some call white noise. Like the buzz of an electrical line and transistor sometimes after a storm.

I then ventured to places far away from the grid into the Desserts, up mountain peaks, under the sea and these frequencies actually get louder...

I have learned to live with them constantly, I can tune them out or increase their volume. Sometimes I try to embrace it other times I try to consciously resonate with the same frequency from within... others times I like to surf the subtler vibrations that are layered upon the main high pitch dominate sound. & Yes it can be annoying. The base frequency I hear is similar to 4096 Hz but that seems to be a constant or at least a reference point on an infinite scale