I bought this 1/2 horsepower disposal based on what I read on line.
It says it “is insulated & quiet”.    Mine is VERY loud.....maybe the
loudest disposal we have ever had in 47 years of owning homes.
I would think today’s models would be much improved for sound 
than ones we bought back in the 1970’s.   This one is NOT.
Very disappointed !  How can you tell looking at the box it is in
on a shelf in a store ?