Frequency
390 Hz
Clear Mind
Explore this frequency
Limited research
What it is
A 390 Hz sine tone, close to G4.
What users may experience
Described as clean and slightly brighter than 369 Hz.
Traditional associations
Used in contemporary sound-practice sets aimed at mental clarity.
Sound & relaxation
Non-varying tones give the auditory system very little to attend to, which some people find helpful while reading or working.
How to use it
Play at low volume during study or admin work, ideally with an ambient layer.
Suggested session length
20 · 30 · 45 minutes — listening style: Background; intensity: gentle.
Safe listening
Keep volume low during long sessions.
Pair with
Physical sound properties, human perception, relaxation effects associated with audio, and traditional frequency beliefs are distinct categories and are kept separate above. Nothing here is medical advice. Read the wellness disclaimer