Well, I did my best to go test drive some cars using an SPL meter and came away with mixed results. I will say whoever mentioned the issue with road noise coming from the tires might be on to something. It does seem to be fairly pronounced in what should be an otherwise very quiet car (Equus and Genesis).
What I found was only about 1-2 db swings based on a number of different cars in the same environment. The Equus is quiet, no doubt about it, and the resulting measurements reflected it. At 70 mph the SPL meter read about 66db, but only slightly less than my 2006 750LI. I can't help but wonder how the Equus would sound with different tires.
What I found was only about 1-2 db swings based on a number of different cars in the same environment. The Equus is quiet, no doubt about it, and the resulting measurements reflected it. At 70 mph the SPL meter read about 66db, but only slightly less than my 2006 750LI. I can't help but wonder how the Equus would sound with different tires.