This is an interesting solution for larger homes. Thevacuum cleaner can be installed in a key area of the house: in the basement or in a closet, for example. This isolates the noise.
It’s easier to install in a new house: the piping is installed before the walls are closed. In an existing house, it is still possible to install the pipes to connect the outlets to the central vacuum cleaner. This involves installing one or more outlets in strategic locations to cover the entire surface area of the house. All that’s left to do is connect the long hose to one of the sockets, and you’re done!
There are central vacuum models with or without bag.