Hood very beautiful beast, very loud at lowest speed , after 1 year 
I used whirlpool cheap hood for 17 yrs and did not see this loud 

I am forever GE Appliance user for more than 20 yrs 
For new home we purchased this costly beautiful looking hood, turned too loud in one year , 
Hood is very important tool for kitchen , never coooked without hood on in years and I am in situations can stand Loud hood 
Not sure how to fix this