Ha, there are many methods to stop that. Even the "whisper quiet" ones rarely are. I have mine sat on top of a towel, there is even a guy on here that has his strung from the top of the internal cupboard on his tank stand.
As above, if you have good enough surface agitation from your filter its not necessary, but i threw a small one in as a "just in case" effort a few weeks ago when i had issues, and i've not taken it out as the corys like to play in it. Theres no real need for it, other than a toy for some of the more playful fish.