Apologies for diverging - should be in Tech Log but NVS =
"In fact, the Q Series introduced a whole new generation of turboprops with its revolutionary Noise and Vibration Suppression (NVS) system. NVS lowers cabin noise and vibration to levels previously unattainable in a turboprop… lower in fact than many commercial jet interiors. "
from Bombardier's site.
If you wana know how it works try a search on Tech Log - it's probably been done before.
Cheers
sB