White Noise Generator — Sleep & Focus Sounds

White noise has equal energy at every frequency — it sounds like a TV static hiss. Pink noise reduces high-frequency energy at 3 dB per octave, producing a softer, more balanced sound (like steady rain). Brown noise reduces energy at 6 dB per octave, creating a deep, low rumble (like ocean waves). Most sleep researchers prefer pink or brown noise.

Multiple studies show that consistent ambient noise can improve sleep quality by masking disruptive sounds (traffic, neighbors, snoring). Pink noise in particular has shown benefits in sleep research for deepening slow-wave sleep. Effectiveness varies individually.

Binaural beats work by presenting slightly different frequencies to each ear (requires stereo headphones). The brain perceives the difference as a beat frequency — for example, 200 Hz in one ear and 204 Hz in the other creates a 4 Hz beat, which some research associates with reduced anxiety and improved focus. Evidence is preliminary but promising.

Yes, at reasonable volume levels. Keep your speaker or device volume below 50 dB (about the volume of a quiet conversation) to protect hearing. Some sleep medicine specialists recommend using a sleep timer so the noise plays for 1–2 hours as you fall asleep rather than all night.

Brown noise is often preferred for focus tasks — its deep, steady rumble is less cognitively distracting than white noise while still masking speech and ambient sounds. Coffee shop ambient noise (~70 dB) also correlates with creative performance in some research. Try different noise colors and see what works for your task.