While it's still a couple of years out at least, SpaceX has been doing the important paperwork detailing their plans to launch Starship and Super Heavy from Launch Complex 39A at the Kennedy Space Center. A great deal of new info has come to light in the Environmental impact report including information on the sound levels as a result of the engines and the sonic booms from reentry. Also some detailed modelling on the chemical composition that results from the Raptor engines, gives us some more info on what to expect from the final Raptors. The report is available here: https://netspublic.grc.nasa.gov/main/20190801_Final_DRAFT_EA_SpaceX_Starship.pdf