title: contradiction between filtering noises versus identifying important noise
body: <p>I was given this question for my exam, and I could not find a good answer for it online. I am wondering if some one can help me with it please!
  The question is:
  When filtering sensor data there is contradiction between filtering noises versus identifying important noise which could be meaningful. Describe an outline of an algorithmic approach which could be useful for identifying when a noise should be filtered versus when it could represent an interesting value of interest. Many thanks in advance. </p>