← Frequency Library
Frequency
90 Hz
Low Focus
Explore this frequency
Limited research
What it is
A 90 Hz sine tone.
What users may experience
Usually perceived as a soft continuous hum in the background.
Traditional associations
Used as a background drone in long working or study sittings.
Sound & relaxation
Continuous, information-free sound is often preferred over music for concentration because it carries no lyrics or melodic surprises.
How to use it
Play quietly during focused work. Combine with rain or brown-noise ambience.
Suggested session length
30 · 45 · 60 minutes — listening style: Background; intensity: gentle.
Safe listening
Keep volume low for 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