Brown noise
Some evidence
A deep, low rumble many find good for focus.
A deep, low rumble many find good for focus.
What the science says
Brown noise is deeper still, heavy on the low end. It is very popular for focus and sleep, though formal research on it is thin so far.
The traditional view
Like a heavy waterfall or distant surf: a warm, bassy hush.
174 Hz
The lowest Solfeggio tone, used for grounding and ease.
396 Hz
Traditionally tied to releasing fear and grounding.
417 Hz
Associated with change and clearing the slate.
528 Hz
The famous "love" tone, popular for relaxation.
639 Hz
Traditionally linked to connection and warmth.
741 Hz
A brighter tone tied to expression and clarity.