Could hitting/going over a curb damage a turbo?

I bought a new car last week, a 57 plate Vauxhall Vectra 1.9 CDTI.
I love it, particularly the fact that I can actually hear the turbo nice and loud on this car (in gears 1-2, quieter in gear 3 ) as I could not hear the turbo in my previous cars.

I was McDonalds car park tonight, I was driving around 5 - 8 mph and I accidentally hit and went over a curb approx. 4 - 6 inches high. the front passenger side hit and went over the curb making a horrible thud noise.

Immediately after I realized the turbo only seems half as loud as it did before hitting the curb, also when driving after wards when decelerating I hear a quiet whose that I am sure was not there before.

is it possible I may have damaged my turbo via hitting the curb or is that not possible ?

thanks