All 72 Hush sounds,by group and by shape.
Brown, pink, white and violet noise, and the sounds of water, weather, home and travel. Each one measured from 2 to 12 kHz, so you can see what it sounds like before you play it.
- Six free
- 51 with layers
- All offline
Noise colours
Four families of steady noise, from the deepest to the sharpest.
Brown noiseThe deepest colour. Power falls by about 6 dB each time the frequency doubles.
Pink noiseThe balanced colour. Every octave carries the same power.
White noiseThe bright colour. Every frequency carries the same power.
Violet noiseThe sharpest colour. Power rises by about 6 dB each time the frequency doubles.Everyday sounds
Rain, wind, fans and cabins: steady like noise, with movement of their own.
The six free sounds
These play without a subscription or an account, darkest first.
Cool airSoft room humTilt −4.5 dBper octaveCompressorVentHumFree
Soft rainLight on leavesTilt −4.4 dBper octaveDropsDistant rainBackgroundFree
Deep brownLow and groundingTilt −3.4 dBper octaveOne steady soundFree
Ocean washSlow rolling surfTilt −3.0 dBper octaveWavesFoamDistant surfFree
Velvet noiseSoft and balancedTilt −0.2 dBper octaveOne steady soundFree
White staticClean and steadyTilt +1.6 dBper octaveOne steady soundFree
Compare noise colours
Two colours side by side, band by band.
How to read the shapes
Each sound was measured in nine one-octave bands centred from 2 to 12 kHz, the range Hush uses for pitch matching. The bars show how strong a sound is in each band. A sound that slopes down to the right is dark; one that climbs is bright.
Tilt sums that slope up in one number, in decibels per octave. Deep brown falls 3.4 dB per octave. Violet static rises 6.1 dB per octave.
Levels are relative to each sound's own overall level, so they describe its shape and not how loud it plays. Measured this way, per octave band, pink noise is level, white noise climbs about 3 dB per octave and brown noise falls about 3 dB per octave. The figures come from Hush 1.0.0 (9).
Guides
20 short guides to noise colours, sleep, focus and tinnitus.
Noise coloursNoise coloursWhat each noise colour means, from brown to violet, which names have no strict definition, and how Hush's own noises measure.
SleepSound for sleepHow to choose a sleep sound you stop noticing, how loud to play it, and whether it should stop once you are asleep.
SleepRain vs white noiseRain is darker than white noise and keeps moving. In Hush, Soft rain falls 4.4 dB per octave and White static rises 1.6 dB per octave.
Focus and noiseCovering conversationBackground sound cannot block voices, but it can make them harder to follow. Which sounds cover speech best, measured, and why louder is not the answer.Questions
How many sounds does Hush have?
72: 6 brown noise, 5 pink noise, 6 white noise, 4 violet noise, 13 water, 12 nature, 16 home, 10 travel.
Which Hush sounds are free?
Velvet noise, Deep brown, White static, Soft rain, Ocean wash and Cool air. They need no subscription and no account. The rest are part of Hush Plus.
Do Hush sounds need an internet connection?
No. Every sound is stored on the device and plays offline.

