For an image, the reduction of this phenomenon can be achieved by Gaussian smoothing.
Ken Perlin, who names a type of this phenomenon useful in computer graphics, also developed its simplex type. For an image, the reduction of this phenomenon can be achieved by Gaussian smoothing. A type of this phenomenon that occurs in resistors is caused by the random thermal motion of electrons, and is called the Johnson-Nyquist type. Although this phenomenon is defined as a disturbance in a system that interferes with the reception of information, the white type can be used to mask unwanted sounds. For 10 points, name this phenomenon that is paired with "The Signal" in the title of a Nate Silver book about predictions. 
Ken Perlin, who names a type of this phenomenon useful in computer graphics, also developed its simplex type.
noise