Pink Noise — 2 Hours
2 Hours of pink noise — no ads, no buffering. Free with sleep timer.
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Curated long-form pink noise from YouTube. Click to play — no need to leave this page.
Pink Noise for 2 hours
Pink Noise for 2 hours is ideal for deep work session, extended study block, evening wind down. Two hours covers a standard deep work block - long enough to reach and sustain flow state, short enough to prevent the cognitive fatigue that accumulates in longer sessions.
Pink noise loses about 3 decibels per octave as frequency increases — halfway between the brightness of white noise and the depth of brown noise. The result sounds like a gentle waterfall, steady rain, or wind through trees — natural, balanced, and warm. Pink noise has the strongest scientific evidence of any ambient sound. A Northwestern University study found it extends deep sleep (slow-wave sleep) by 25% and improves next-day memory recall, because its frequency profile matches the brain's own sleep oscillation patterns. A systematic review by Capezuti et al. (2022) found that 81.9% of pink noise studies showed positive sleep outcomes, compared to just 33% for white noise. For older adults, pink noise improved memory recall by 3x (Papalambros et al., 2017). Important caveat: Basner et al. (2025, UPenn) found continuous pink noise at 50 dB reduces REM sleep by 18–19 minutes — use a sleep timer.
Best for
2 Hours — when to use
Two hours covers a standard deep work block - long enough to reach and sustain flow state, short enough to prevent the cognitive fatigue that accumulates in longer sessions. Cal Newport's research on deep work suggests that most knowledge workers can sustain 2-4 hours of truly focused work per day. A 2-hour session with this sound is a single deep work block. Plan a 15-20 minute break afterward.
Pink Noise — all durations
Pink Noise variants
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Sound helps you fall asleep. Gradual fade lets your brain cycle through REM undisturbed.
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Frequently Asked Questions
What is pink noise?
Balanced noise that loses 3 dB per octave. Sounds like a gentle waterfall or steady rain. Has the strongest scientific evidence of any ambient sound for sleep.
Is pink noise good for sleep?
Yes — pink noise rates 5/5 for sleep on Softly. Pink noise loses about 3 decibels per octave as frequency increases — halfway between the brightness of white noise and the depth of brown noise. The result sounds like a gentle waterfall, steady rain, or wind through trees — natural, balanced, and warm.
How long should I listen to pink noise?
Two hours covers a standard deep work block - long enough to reach and sustain flow state, short enough to prevent the cognitive fatigue that accumulates in longer sessions. Cal Newport's research on deep work suggests that most knowledge workers can sustain 2-4 hours of truly focused work per day. A 2-hour session with this sound is a single deep work block. Plan a 15-20 minute break afterward.