How these ocean waves are made
There are no recordings here. Every wave is synthesized live in your browser with the Web Audio API, which means the sound never loops and you can reshape it in real time. The trick to making noise sound like the sea is motion: real waves rise, break, and recede on a slow rhythm, and the brightness of the spray changes as each one crests.
Three layers, one swell
The generator stacks three layers of filtered noise, then ties them to a slow oscillator that acts like the pulse of the sea:
The rumble bed
Brown noise through a low filter gives the deep, constant body of water underneath everything — the weight of the ocean. It breathes very gently so it never feels static.
The swell body
Brown and white noise pass through a moving lowpass filter. A slow sine wave (the swell) lifts its volume, opens its filter, and drifts it across the stereo field, so each wave rolls up and rolls away.
The foam & spray
High-passed white noise sits on top, but it only swells up near the crest of each wave. That is the hiss of foam breaking, rising and receding in time with the body of the wave.
The slow swell
A low-frequency oscillator running at roughly 0.05 to 0.22 Hz sets the rhythm — one wave every 5 to 20 seconds. A second, slower oscillator is mixed in at a different rate so no two swells land in exactly the same place, the way real wave sets never repeat. The wave speed control changes how often waves arrive, wave size sets how much each swell rises and falls, and tide & brightness moves the filters from a muffled, distant sea to bright, close spray.
Why ocean sounds are soothing
Ocean waves share the same broad, gentle frequency profile as pink noise, the kind of sound that masks sudden noises without grabbing your attention. The slow, predictable rise and fall is the part that calms: your brain quickly learns the pattern and stops tracking it, which is why steady wave sound can help you settle, drift off, or stay in a task. There is nothing to listen for, just something steady to rest against.
- For sleep: a slow, deep swell (try Calm shore or Distant ocean) masks household and street noise. See the ocean waves for sleep guide.
- For meditation: the rolling rhythm gives the breath something to follow. See the meditation guide.
- For focus and studying: steady wave sound covers conversation and keyboard clatter without lyrics to distract you. See the studying guide.
- For tinnitus: broadband wave sound can blend with ringing as gentle sound enrichment. See the tinnitus guide.
Listening comfortably
- Keep the volume moderate. Use the lowest level that covers the sounds you want to mask. If you must raise your voice over it, it is too loud.
- Let it run. The sound is generated live, so it can play for hours without repeating.
- Use the sleep timer. It fades out gently rather than cutting off, so it won't wake you.