Unfortunately hearing frequency response and sensitivity varies greatly.Commenting about tire noise demands acoustic test equipment so that things have a reference number.
What is loud to one is quiet to another. Tires interact with road surfaces and noise level will depend on road designs which vary from area to area and state to state.
States must compomise road quietness with road life. The noiser the design usually the longer the road lasts before needing resurfacing [hardness of asphalt and concrete].
http://findarticles.com/p/arti...73722
"Above 60 kph, tyre noise dominates over other noise sourcesfor almost all vehicles""Little is known about how a tyre performs over time, but the current trend for many tyres is thought to be for the noise level to increase as the tread wears down (Sandberg and Ejsmont, 2002). If this relationship is correct, then tyre noise will tend to increase slowly over much of the life of a tyre. A type approval test where a tyre has covered a certain distance (e.g. when worn to 50%) would therefore be more representative of the tyre noise that might be expected to be generated from the tyre over its useful life."
97 page EU engineering report on tire/road noise:
http://www.dft.gov.uk/pgr/road...eport
http://www.fhwa.dot.gov/enviro...e.htm