Howtosignalprocessing
White noise refers to a noise that contains all of the frequencies across the spectrum of audible sound. With color noise, the frequencies are different and this difference can be heard. For example, Pink noise is recognized in natural sounds such as rainfall, waves crashing on a beach, etc.
- What do the different colors of noise mean?
- What is the difference between white noise and green noise?
- What is white noise and blue noise?
- What does white noise stand for?
What do the different colors of noise mean?
The color of noise is determined by the energy of the sound signal. Specifically, it depends on how energy is distributed over various frequencies, or the speed of sound. Pink noise consists of all frequencies we can hear, but the energy isn't equally distributed across them.
What is the difference between white noise and green noise?
Green noise is actually a variation of white noise, full of sounds that call nature to mind, like ocean waves or trickling waterfalls. Since its frequency isn't super high, it's a good fit for those who like gentle ambient noise while falling asleep.
What is white noise and blue noise?
White noise is familiar to most people, but it's not the only color of noise that exists. Blue noise, which is sometimes considered high-frequency white noise, is a noise color with a spectral density (power per hertz) that is proportional to its frequency.
What does white noise stand for?
The noise types are named for a loose analogy to the colors of light: White noise, for example, contains all the audible frequencies, just like white light contains all the frequencies in the visible range.
