# What is blue noise?

https://hushmachine.com/sounds/blue-noise · Free; +3 dB per octave · Kallos Labs

> Blue noise is random sound whose power rises by 3 dB with each octave: the mirror image of pink noise. It sounds brighter and thinner than white noise, mostly high hiss.

## What it sounds like

Brighter than white, for people who like hiss.

## How Hush Machine makes it

Hush Machine filters live white noise so its power rises by 3 dB per octave. It sits between violet and white on the dial.

## How people use it

- For people who like a light, airy hiss.
- Covering high-pitched sounds.

## Questions

### Where else is blue noise used?

In image dithering and audio dithering, where its high-frequency energy is less visible or audible than other noise.