When it comes to audio-based sleep aids, two of the most popular choices are Delta wave binaural beats (1-4 Hz) and Brown Noise. Both are available in our generator, but they work in very different ways.
So, which one is right for you? Let's compare.
What Are Delta Waves? (The "Brain Tuner")
Delta waves are the slowest brainwaves your brain produces, and they are dominant during deep, restorative, dreamless sleep.
A Delta binaural beat (e.g., a 2 Hz beat) works via brainwave entrainment. By listening to this slow, rhythmic pulse, you're "inviting" your brain to slow down its own activity and synchronize with that deep-sleep frequency.
- How it feels: A very slow, hypnotic "wub-wub-wub." Many people find the beat itself to be deeply relaxing and meditative.
- Best for: People who have trouble "shutting off" their brain. If your mind is racing, the hypnotic pulse of a Delta beat can give it something simple to focus on and "latch onto" as it drifts off.
How to Use Delta Waves for Sleep:
Try this preset in our Generator:
- Preset: "Delta (1 Hz) - Deep Sleep" (or set it manually)
- Beat Frequency: 2 Hz (a good starting point)
- Carrier Frequency: 100 Hz (a very low, rumbly tone)
- Waveform: Sine
- Tone Volume: 70%
- Timer: 30 minutes (to help you fall asleep)
What is Brown Noise? (The "Sound Wall")
Brown Noise (also called Brownian or Red Noise) is a "colored" noise that has most of its energy concentrated in the lower frequencies.
Think of it as a deeper, more rumbly version of White Noise. It sounds like a strong waterfall, distant thunder, or the inside of an airplane cabin.
Brown Noise does not work via brainwave entrainment. It works by creating a "sound wall" or "sonic blanket" that masks external, sudden noises like traffic, a door slamming, or a dog barking.
- How it feels: A steady, constant, low-pitched "whooshing" sound. It's very "full" and immersive.
- Best for: People who are light sleepers or live in noisy environments. If you find yourself waking up in the middle of the night due to small sounds, Brown Noise is your best solution.
How to Use Brown Noise for Sleep:
Try this preset in our Generator:
- Beat Frequency: 0.1 Hz (or turn off Tone Volume)
- Tone Volume: 0% (you're not using the tone)
- Noise Type: Brown Noise
- Noise Volume: 40-60% (loud enough to mask sounds, but not be intrusive)
- Noise Filter Type: Allpass (or Lowpass at 5000 Hz)
- Timer: 0 (let it play all night) or download a file.
The Verdict: Which Should You Choose?
Use Delta Waves if: Your problem is *falling* asleep because your mind is too active.
Use Brown Noise if: Your problem is *staying* asleep because you're a light sleeper or have a noisy environment.
The "Best of Both Worlds" Pro-Tip
Why not use both? This is where our generator shines. You can combine them to create the ultimate sleep audio.
Use the Delta Wave preset (2 Hz beat) to help your mind slow down and fall asleep, but also add Brown Noise at 20-30% volume.
This way, the Delta beat lulls you to sleep, while the Brown Noise provides a steady sonic blanket to *keep* you asleep. Experiment and find your perfect combination!