Delta-Wave / Binaural-Beat Onset Track

<p><strong>Why this helps:</strong> Evidence for binaural beats as a sleep aid is genuinely mixed. Two 2023 systematic reviews found no consistent brain-wave entrainment effect, with results across studies contradicting one another (Orozco Perez et al., Frontiers in Neuroscience, 2023; Ingendoh et al., 2023). One recent exception found 0.25 Hz binaural beats shortened the latency to slow-wave sleep during daytime naps (Oba et al., Scientific Reports, 2024). Researchers describe binaural beats as a low-risk adjunct, not a proven treatment.</p><h4>Intro copy (start screen)</h4><p><strong>Delta Onset</strong><br>*A slow, low tone designed to ease you toward sleep. Best with headphones.*</p><p>This track plays two slightly different low tones, one in each ear. Your brain registers the gentle difference between them as a slow pulse in the delta range, the frequency band that matches the deepest stage of sleep. Some people find this kind of sound helps them drift off. Some notice nothing in particular and simply enjoy the steady, low hum. Either is fine.</p><p>Use it the way you would use a quiet, repetitive sound: let it run in the background, stop thinking about it, and let your attention go soft.</p><p><span class="srp-cue">[Button: Play with headphones]</span> <span class="srp-cue">[Button: Set sleep timer]</span></p><p>Sleep timer options: 30 min · 1 hr · 2 hr · Fade and stop</p><p>Helper line: *Keep the volume low. This is meant to sit just under your awareness.*</p><h4>Honest research note (in-app "What the science says" panel)</h4><p>We want to be straight with you about this one.</p><p>The idea behind binaural beats is appealing: play two slightly different tones and nudge your brain toward a slower, sleepier rhythm. But the research does not strongly support that mechanism. Two separate 2023 systematic reviews looked across dozens of studies and found no consistent evidence that binaural beats actually entrain brain waves; the studies contradicted one another, with about as many showing no effect as showing one (Orozco Perez et al., Frontiers in Neuroscience, 2023; Ingendoh et al., 2023).</p><p>There is one recent, more encouraging result: a 2024 study found that a very low 0.25 Hz binaural beat shortened the time it took people to reach deep sleep during daytime naps (Oba et al., Scientific Reports, 2024). That is a real finding, but it is a single small study in nap conditions, not proof for everyday nighttime use.</p><p>So here is our honest take: this track is a low-risk thing to try. If the slow tone helps you relax and fall asleep, wonderful, use it. If you notice no difference, you are not doing anything wrong, and the soundscape mixer or pink-noise generator may serve you better. Do not expect it to work like a medicine, because the evidence does not show that it does.</p><h4>Safety and headphones disclaimer</h4><ul><li>*Headphones recommended.* The effect depends on each ear hearing a slightly different tone, so it will not work through a single speaker.</li><li>*Keep the volume low.* Listening to anything at high volume through headphones can harm your hearing over time. Set it just loud enough to notice, no louder.</li><li>*Comfort first.* If you fall asleep in earbuds often, consider a soft headband-style sleep headphone instead of hard earbuds.</li><li>*Not a medical device.* This track is a relaxation aid, not a treatment for insomnia or any sleep disorder. If you regularly cannot sleep, please talk to a doctor.</li></ul><h2>Sources</h2><ul><li>Orozco Perez et al., Frontiers in Neuroscience, 2023 — systematic review, no consistent brain-wave entrainment from binaural beats.</li><li>Ingendoh et al., 2023 — systematic review, inconsistent results across studies (some supporting, more contradicting entrainment).</li><li>Oba et al., Scientific Reports, 2024 — 0.25 Hz binaural beats shortened latency to slow-wave sleep during daytime naps.</li></ul>