Sure, most of the noises will loop – from the Help “Loop Period
This setting is available for almost all types of noise, with the exception of Electric, Gaseous, Random and Wavy Turbulence, and will loop the noise in accordance with the time in seconds defined (Animation Speed) must not be set to 0). A value of 0 will turn this effect off. Note that, internally, the animation speed can then be adjusted accordingly and therefore change.”. So as long as you are not using Electric, Gaseous, Random or Wavy Turbulence you just set the loop period to the length (in seconds) of the loop you want.