285 Hz to Sleep, Rest, Study | Black Screen | 30 Minutes

285 Hz pure tone for 30 minutes on a completely black screen. Press play, turn the brightness down or put your phone face down, and let it run. ABOUT 285 HZ 285 Hz is the second tone in the extended nine-tone "Solfeggio frequencies" lists. It sits between the musical notes C#4 and D4 and has a soft, rounded character. Sound-healing sources attach health claims to this number, but none are backed by research, so treat it as a pleasant tone and nothing more. The tone is a single sine wave, generated digitally on exactly 285 Hz. – HOW TO USE Set the volume low, press play, then turn the brightness all the way down or put your phone face down. The screen stays black for the whole video. THE SOUND One steady tone, generated digitally on the exact frequency in the title. No music, no voice, no visuals. OTHER LENGTHS More lengths (15, 20, 45 and 60 minutes) are coming soon. See the playlists on the channel. GOOD FOR Falling asleep, resting, studying, reading, meditation and quiet background focus. NOT MEDICAL ADVICE Frequency tones are not a treatment for any condition. Research on frequency-specific effects is limited and mixed. If you have trouble sleeping or concentrating over time, talk to a doctor. – Created by Ricardo Valera García. – 285 hz, 285 hz tone, 285hz black screen, 285 hz 30 minutes, 285 hz sleep, 285 hz solfeggio, solfeggio frequencies, black screen frequency, frequency tone, pure tone, sleep sounds, study sounds – #285hz #blackscreen #sleepsounds