Fastrack will never be the quietest track but you can do things to help with the noise level.
Carpet noise fastrack.
I also used 2 layers of snow blanket on my xmas layout and it helps i ve tested carpet padding on my layout with some of the track on the foam board and some on the carpet padding and the difference is night and day.
To eliminate all noise look for a rating that is 75 or higher.
I ve run fastrack on carpeting and it s queiter but to me carpet still lets the sound to escape from under the track.
Even after doing these things fastrack tends to be a bit louder than traditional track but it makes the noise tolerable.
Homasote absorbs much of the sound that gets through the carpet padding.
Finally rather than putting fastrack right on top of a wooden table put a layer of homasote in between the track and the table.