you will never hear the turbo...
it is too small, and it has journal bearings.
not even an aftermarket intake will make you hear the "woosh" of the turbo sucking air in....maybe a little bit, but you'll only hear it from inside the car... no one outside will notice much.
heres a few vids of what you hear on a car with an upgraded turbo
Supra with upgraded twins vs bolt-on 'Busa(the "Walser" Supra)
685hp RX-7, Skip to 8:15 and go from there, you'll clearly hear the turbo