Editing Colors of noise (section)

===Velvet noise===
[[Image:Velvet_Noise_Spectrum.jpg|thumb|right|Velvet noise spectrum]]
Velvet noise is a sparse sequence of random positive and negative impulses. Velvet noise is typically characterised by its density in taps/second. At high densities it sounds similar to white noise; however, it is perceptually "smoother".<ref name="Välimäki2013">{{cite journal | doi=10.1109/TASL.2013.2255281 | title=A Perceptual Study on Velvet Noise and Its Variants at Different Pulse Densities | date=2013 | first1=Vesa | last1=Välimäki | first2=Heidi-Maria | last2=Lehtonen |first3=Marko | last3=Takanen | pages = 1481–1488 | journal= IEEE Transactions on Audio, Speech, and Language Processing| volume=21 | issue=7 | s2cid=17173495 }}</ref> The sparse nature of velvet noise allows for efficient time-domain [[convolution]], making velvet noise particularly useful for applications where computational resources are limited, like real-time [[reverberation]] algorithms.<ref>{{cite conference | first1=Hanna | last1=Järveläinen | first2=Matti | last2=Karjalainen | title=Reverberation Modeling Using Velvet Noise | publisher=[[Audio Engineering Society|AES]] | location= Helsinki, Finland | conference = 30th International Conference: Intelligent Audio Environments | date = March 2007}}</ref><ref>{{cite web |url=https://ccrma.stanford.edu/~keunsup/screverb.html | title = The Switched Convolution Reverberator, Lee et. al.}}</ref> Velvet noise is also frequently used in decorrelation filters.<ref>{{cite conference | first1=Benoit | last1=Alary | first2=Archontis | last2=Politis | first3=Vesa | last3=Välimäki | title= Velvet-Noise Decorrelator | location= Edinburgh, UK | conference = 20th International Conference on Digital Audio Effects (DAFx-17) | date = September 2017}}</ref>

{{Listen|filename=Velvet noise.ogg|title=2 seconds of velvet noise.}}

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