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Rain, brown noise and focus: what the research says

Why a gentle background sound can help you concentrate, how loud it should be, and how to pair it with a focus timer on every new tab.

Updated · 3 min read

Silence isn’t always the best place to think. A steady, gentle sound can mask the chatter and clatter that pull your attention away. Here’s what the research says, and how to use it without overdoing it.

47 secHow long attention now stays on one screen, on average, down from about two and a half minutes in 2004, according to Gloria Mark’s book Attention Span (2023).

What the studies found

In a 2012 paper in the Journal of Consumer Research, Ravi Mehta, Rui Zhu and Amar Cheema ran five experiments on ambient noise. A moderate level, around 70 decibels, helped people on creative tasks compared with a quiet room. A loud level, around 85 decibels, made them worse. The idea is that a little noise nudges you to think more broadly, while a lot of it simply overwhelms you.

That fits everyday experience: a café hum can help you write, a jackhammer can’t. It also means the volume matters as much as the sound.

Which sound to pick

  • Rain: steady and familiar, good for reading and writing.
  • Stream or ocean: slow, rolling movement, good for winding down.
  • Brown noise: deep and soft, good for blocking low rumbles and voices.
  • Pink noise: balanced, like steady rain without the drops.
  • White noise: bright, best at masking nearby speech.

Pair it with a timer

Sound works best with a clear start and stop. In Pax, name today’s focus, start a 25-minute timer and put on a sound in one place, on the page you see every time you open a tab. When the timer ends, take a short break. The timer and sounds keep going if you close the tab.

Keep it gentle

Set the volume just loud enough to soften the room, not to fill it. If you notice the sound itself, turn it down. And if silence works better for you on a given day, that’s fine too: the research describes averages, and you know your own head best.

Questions people ask

Does background noise help you focus?

It can. In five experiments, Mehta, Zhu and Cheema (2012) found a moderate level of ambient sound helped creative tasks compared with quiet, while loud sound hurt. Effects vary by person and task.

How loud should focus sounds be?

Around the level of a busy café or steady rain, not louder. In that study, moderate (about 70 dB) helped and loud (85 dB) hurt.

What’s the difference between white, pink and brown noise?

White noise has equal energy across frequencies and sounds bright. Pink noise falls off with pitch, like steady rain. Brown noise falls off further and sounds deep, like a distant waterfall.

Are the sounds in Pax free?

Yes. Background sounds and the focus timer are part of the free plan, and the sounds are made in your browser, so there’s nothing to download.