Thanks for the update.

In the meanwhile, I've spoken to a track guy with his Integra and he stated clearly that semis are quiet on the first miles when new. But with more mileage on them they get noticeably noisier. He said that the difference was night and day AFTER the first trackday in summer or after a serious heat cycle. He was talking about Yokohama semis available back then. Not sure if the AD08 is an exception of the rule or a different tire.