1 Hz represents the very floor of brainwave activity — one oscillation per second. It is the slowest measurable rhythm the brain produces and is associated with the deepest possible states of unconscious sleep, when external awareness is entirely absent and the body's repair mechanisms operate at full capacity.

At this frequency, the brain is in its most quiescent state. Growth hormone release peaks, the immune system performs its most intensive maintenance, and the processes of cellular repair and memory consolidation proceed without interference from conscious thought. It is the frequency of total rest.

Because 1 Hz is far below the range of human hearing, this page delivers it as a binaural beat — your left ear hears 149.5 Hz while your right ear hears 150.5 Hz. The 1 Hz difference between them creates an extremely slow pulsation that your brain can synchronise with. Use this before sleep or during deep rest sessions.