What is the bathroom fan noise level, how to choose? Hear 1 and 2.5 sones sound level - YouTube
Ancona 0.7-sone 80 CFM White Bathroom Fan Energy Star Certified AN-4808 | Réno-Dépôt
Cyclone Hushtone Bath Fan - 80 CFM LSE80 | RONA
Panasonic FV-0511VKSL2 White WhisperGreen Select 110 CFM 0.8 Sone Ceiling Mounted Energy Star Rated Bathroom Fan with LED Light and Integrated Multi-Speed - FaucetDirect.com