Bliss sound library
Grade
College and university
High school
1 - 15 of 15 results
Frequencies like delta (0.5–4 Hz) and theta (4–8 Hz) waves are associated with deep sleep and relaxation. Listening to sounds that match these frequencies helps synchronize your brain waves to enter deep sleep states more easily. White noise, pink noise, and other constant sound frequencies can mask environmental noises that might disrupt sleep.