What is the difference between white, pink and brown noise?
White noise has equal energy at every frequency and sounds like a bright hiss. Pink noise gets weaker toward higher frequencies (about 3 dB per octave) and sounds softer. Brown noise drops off even faster (about 6 dB per octave) and sounds low and deep. Which one suits you is personal, so try them side by side.
Are the rain and wave sounds recordings?
No. They are made by filtering noise and slowly varying its volume and brightness, which is why they are called “rain-like” and “wave-like”. They do not sound exactly like real recordings.
Does it stop if I switch tabs or turn off the screen?
In desktop browsers it keeps playing while you look at another tab or window. On phones and tablets, turning off the screen or switching apps may stop the sound, depending on the device and browser. If it stops, come back to this page and press Play. Pressing a sound you haven’t selected while stopped also adds it and starts playback.
It says playing, but I can't hear anything
The line under the Play button tells you if the sound is muted or a volume is at 0. If not, check your device volume and output (earphones or speakers). On iPhone, browser sound may not play while the silent switch is on.
How does the timer work?
Playback stops after the chosen time. It counts only while playing; while this page stays open, stopping keeps the remaining time (reopening the page resets it to the chosen time). The sound fades out over the last 30 seconds, so it never cuts off abruptly. If you play again after it stops, it counts from the full time again.
Does it actually help me focus?
It varies from person to person, and there is no guarantee. If it doesn't suit you, try another sound or stop using it. When listening for a long time, keep the volume low to protect your hearing.