Aren't all tyre test noise levels measured externally?
Auto Express and some others measure cabin noise.
Hankooks produce the least cabin noise.
Audi TTS Quattro fitted with these.
Hankook the quietest.
Dunlop also quiet.
Goodyear has updated rubber. Considered a quiet tyre. New one next year.
Continental considered to be a bit noisy. Great tyre though.
Michelin PSS considered to be reasonably quiet. Best tyres overall. Expensive.
Michelin PS3 tyres very noisy and not that good.
Bridgestone tyres the noisiest and rubbish.
Continental CS6 fitted to Honda Type R. Size 235/35 R19 91Y. Very good Rim Protection.