I know this is riding the ragged edge of IMHO, but I thought it should be here because db levels can be measured.
It seems to me that as I cast off the hand-me-down appliances from the 1970’s and replace them with new ones, the decibel level in the house jumps tremendously.
For example: old Hoover vacuum cleaner: not too loud. New vacuum cleaner: FREAKING loud.
Another: old Sears blender: loud. New Osterizer: ear-blending.
So, are appliances ACTUALLY louder than they used to be (not just seem)?
And if so, why? I have two guesses: 1) they are less insulated than they used to be. 2) The motors run at much higher RPMs, making them much louder.