Intamin Blitzs use LSM systems provided by Indrivetec, but obviously VelociCoaster uses a much more recent and up to date system.Do we know what launch system Maverick uses? And do we know what launch system Velocicoaster uses?
The loud sound of Taron's launch does actually not come from the launch fins itself but from the current source inverter (might be the wrong word, on German it's Wechselrichter). If you can put the inverter outside of the tunnel, then you wouldn't have a noise problem (but maybe a ton of other problems, I'm no engineer ?).
The sound comes from the vibrations created by the fins when a train is launched, a mixture of that and the transformers used to power each LSM motor, I believe.