noise.svg

<svg
        xmlns='http://www.w3.org/2000/svg'
        xmlns:xlink='http://www.w3.org/1999/xlink'
        width='300' height='300'>

    <!--
    Mon svg de qualite superieure
    Bordel que j'aime cet effet
     -->

    <filter id='n' x='0' y='0'>
        <feTurbulence
                type='fractalNoise'
                baseFrequency='0.75'
                stitchTiles='stitch'/>
    </filter>

    <rect width='300' height='300' fill='#fff'/>
    <rect width='300' height='300' filter="url(#n)" opacity='0.70'/>
</svg>