Subwoofer or headphones likely required to hear this extremely deep noise.

Download it here: https://cheesynirvosa.bandcamp.com/tr...

This is some grey noise which has been deepened significantly with multiple overlapping low-pass filters. It is perfect for sleep, focus, relaxation, and drowning out other annoying noises.

" Grey noise is random noise subjected to a psychoacoustic equal loudness curve (such as an inverted A-weighting curve) over a given range of frequencies, giving the listener the perception that it is equally loud at all frequencies. " - en.wikipedia.org/wiki/Grey_noise