Ok- so you let's say you are making noise- your mixers are constantly in the red, the amps are cranked, everything is so loud that your ears are going to be ringing, and then you stumble across a sound that just cuts through everything and appears even louder than everything else. (like i said before its usually a saw tooth-ish kind of of buzz).
this happens when
- your old noise and your new noise consist of different frequencies, and the new noise has more hi-mids
- you put a compressor on the old noise and sidechain it with the new noise
- your new noise is richer in odd harmonics, for example it's a saw tooth-ish kind of of buzz