White / Pink / Brown Noise Generator

<p><strong>Why this helps:</strong> Pink noise carries more energy in the lower frequencies, a profile that resembles the slow brain waves of deep sleep, and small studies have linked it to enhanced slow-wave activity and memory consolidation, though effects depend heavily on timing and remain an early research area (Northwestern Medicine, via MedicalXpress, May 2024; Frontiers in Human Neuroscience, December 2023; UdeM Nouvelles coloured-noise review, January 2024).</p><h4>Explainer (top of screen): "Three colors of sound"</h4><p>All three of these are steady, even sounds that cover up the sudden noises that can pull you out of sleep. They differ in tone, in how much weight sits in the low end. Try each for a moment. Your ears will tell you which one your body wants tonight.</p><ul><li><strong>White noise</strong> — *The brightest of the three. An even hiss across all frequencies, like static or a fan on high. Good for masking sharp, high sounds, but it can feel harsh to some ears.*</li><li><strong>Pink noise</strong> — *Softer and fuller. The same even sound, but with more weight in the lower tones, like steady rain or wind through trees. Many people find this the most natural to sleep to.*</li><li><strong>Brown noise</strong> — *The deepest. Most of the energy sits in the low end, like distant thunder, a heavy waterfall, or a jet heard from far away. Warm and enveloping. Good for the nights you want to feel wrapped up.*</li></ul><p>Helper line: *There is no single best one. Pink and brown are usually gentler for sleep; white is best when you need to cover a specific bright noise.*</p><h4>UI labels</h4><p>Header: <strong>Noise</strong><br>Sub: *Choose a color. Set the level. Let it run.*</p><p>Color selector (three tabs or large buttons):</p><ul><li><strong>White</strong></li><li><strong>Pink</strong></li><li><strong>Brown</strong></li></ul><p>Controls:</p><ul><li>Slider: <strong>Level</strong></li><li>Helper: *Keep it just loud enough to cover the room, no louder.*</li><li><strong>Sleep timer:</strong> 30 min · 1 hr · 2 hr · 8 hr · All night</li><li>Toggle: <strong>Slow fade to silence at the end: On / Off</strong></li><li><span class="srp-cue">[Button: Play]</span> <span class="srp-cue">[Button: Stop]</span></li></ul><p>Now-playing line: <strong>Playing: Brown noise · fades in 1 hr</strong></p><p>Empty state:<br>*Nothing playing. Pick a color above. If you are not sure, start with pink. It is the one most people settle into.*</p><h4>Research note (in-app "Why this works" panel)</h4><p>The colors are a way of describing where a sound's energy sits. White noise spreads energy evenly across all pitches. Pink noise tilts that energy toward the lower frequencies, and brown noise tilts it further still. Pink noise has drawn the most sleep research because its low-heavy profile resembles the large, slow brain waves of deep sleep (Northwestern Medicine, via MedicalXpress, May 2024). Small studies have found that pink-noise pulses, delivered at precisely the right moment in the sleep cycle, can boost slow-wave activity and next-day memory recall (Frontiers in Human Neuroscience, December 2023).</p><p>It is worth being honest about the limits. Those memory effects come from carefully timed, lab-delivered pulses, not from a steady sound playing all night, and reviews note the broader evidence for color noise improving everyday sleep is still thin and mixed (UdeM Nouvelles, January 2024). What these sounds reliably do is mask disruptive noise so your sleep is less likely to be broken. That alone is reason enough to use them. Choose the color that feels easiest on your ears, keep the volume low, and let it cover the room.</p><h2>Sources</h2><ul><li>Northwestern Medicine commentary on pink noise and slow-wave sleep, via MedicalXpress, May 2024.</li><li>Frontiers in Human Neuroscience, December 2023 — pink noise during sleep and sleep-dependent memory consolidation (timing-dependent).</li><li>Université de Montréal (UdeM Nouvelles), January 2024 — review noting coloured-noise sleep evidence is still limited and mixed.</li></ul>