I guess one would have to choose between a passive dampening and an active one.
The passive is the use of materials that dampen the external sounds and perhaps even the internal ones. Active sound dampening are the use of audioequipment to dampen/eliminate the sounds, by having speakers and microphones inside the tank that registers sound, then turn the phase of the sound 180 degrees and by that eliminating the sound.
I guess one has some tuning to do before it becomes silent and it will probably cost a bit more.
|