2 Hz

What it is

Delta refers to brainwave activity between roughly 0.5 and 4 Hz, most prominent during deep sleep. A 2 Hz sound cannot be heard directly, so GSS renders it as a binaural beat: a 200 Hz tone in one ear and a 202 Hz tone in the other. The 2 Hz difference is perceived as a slow pulsing.

What users may experience

Most listeners describe a slow, gentle wobble between the ears rather than a note. Headphones are required — without them the two tones mix in the air and the effect disappears.

Traditional associations

Widely used in sleep and deep-relaxation audio, where slow binaural rates are associated with winding down at night.

Sound & relaxation

Binaural beats are a well-documented perceptual effect of two slightly different tones. Research on whether they shift brain states or improve sleep is limited and mixed.

How to use it

Use headphones. Play very quietly for 20–45 minutes as you settle for the night. Do not use while driving or operating machinery.

Suggested session length

20 · 30 · 45 · 60 minutes — listening style: Headphones only, night listening; intensity: gentle.

Safe listening

Headphones required. Not for use while driving or operating machinery. If you have epilepsy or a seizure disorder, speak with a clinician before using rhythmic audio.

Pair with