Ocean Waves Sounds Online — Sea and Surf Noise

A recording. You hear field recordings of a real sea; the people who made them are named behind the "i" on the picture. The wave-size slider moves smoothly between a calm, a medium and a heavy recording; crash, foam and depth are three bands of an equalizer, and distance is a filter. Each recording is read by two heads half a loop apart whose balance slowly drifts, so the pattern of waves never repeats exactly. Gulls and thunder are single recorded calls and strikes that sound at their own moments, each from its own side and distance. The "Synthesis" button on the picture replaces the recordings with waves built in the browser.

The file is built from a piece 5 to 20 minutes long (up to 10 for the recordings): the more memory the device has, the longer the piece. A file shorter than the piece does not repeat at all; a longer one repeats it, and the joint is a smooth crossfade with no click. The page names the piece length under the Download button.

The volume goes down to silence over the time set by the fade slider in the timer (up to 5 minutes): slowly at first, faster toward the end. The fade is scheduled on the audio clock, not the page clock, so it starts on time in a background tab too. The picture of the sea darkens together with the sound.

On a computer and on Android the sound continues in a background tab, and pause is available from the lock screen. An iPhone may stop a page's sound when the screen is locked — in that case keep the screen on and open "Whole screen": the picture darkens by itself along with the timer.

In breathing mode the sea breathes in 19-second rounds: the sound swells for 4 seconds — inhale, holds for 7, and falls away for 8 — exhale; the circle on the picture shows the phase. The binaural beat adds a 180 Hz tone to the left ear and 182 Hz to the right — the 2 Hz difference is heard only in headphones.