Sub-Bass Rumble for Overnight Sleep
10 Hours of Ultra-Low Frequency Rumble Below Human Audibility Floor

A sustained sub-bass rumble tuned as low as the ear can safely process, layered with just enough audible brown to give your speakers something to anchor to. The sub energy sits mostly below thirty hertz — felt in the chest and the room itself more than heard — creating a body-level sense of enclosure without occupying the listening frequency range.
No peaks, no gaps, no movement. The combined signal is the single most effective masker in the catalog for bass-range intrusions: traffic, bass-heavy neighbors, HVAC ducts, and upstairs footfalls.
The signal is designed to be felt more than heard, which keeps it from ever pulling the ear back awake. Perfect for bass-range noise sufferers, very heavy sleepers, listeners with good subwoofers, apartment dwellers above busy streets, co-sleepers matched with snorers, and anyone who finds ordinary brown noise insufficient.
Ten unbroken hours of sub-bass rumble carry you through the full night wrapped in low-frequency cocoon. Press play, lie down, and feel the floor hum.