Noise over effect from korg.com http://www.korg.com/global/images/noise.gif

noise-over.css

.noise_over {
  width: 100%;
  height: 100% !important;
  position: absolute;
  left: 0;
  top: 0;
  background: url("/global/images/noise.gif") repeat;
  opacity: 0;
  -ms-filter: "progid:DXImageTransform.Microsoft.Alpha(Opacity=0)";
  filter: alpha(opacity=0);
}
  
a:hover .noise_over {
  opacity: .2;
  -ms-filter: "progid:DXImageTransform.Microsoft.Alpha(Opacity=20)";
  filter: alpha(opacity=20);
  -webkit-animation-name: 'noiseanime';
  -moz-animation-name: 'noiseanime';
  -o-animation-name: 'noiseanime';
  -ms-animation-name: 'noiseanime';
  animation-name: 'noiseanime';
  -webkit-animation-duration: .3s;
  -moz-animation-duration: .3s;
  -o-animation-duration: .3s;
  -ms-animation-duration: .3s;
  animation-duration: .3s;
  -webkit-animation-timing-function: ease-in-out;
  -moz-animation-timing-function: ease-in-out;
  -o-animation-timing-function: ease-in-out;
  -ms-animation-timing-function: ease-in-out;
  animation-timing-function: ease-in-out;
  -webkit-animation-delay: .1;
  -moz-animation-delay: .1;
  -o-animation-delay: .1;
  -ms-animation-delay: .1;
  animation-delay: .1;
  -webkit-animation-iteration-count: 1;
  -moz-animation-iteration-count: 1;
  -o-animation-iteration-count: 1;
  -ms-animation-iteration-count: 1;
  animation-iteration-count: 1;
}