I'm here to tell you first hand that the Continental tires I had mounted have solved the sound issue. My Blue tooth works fine now and I don't have to keep the volume of the stereo cranked up so much......It's a miracle! It's as quite as my Lexus RX350 and the ride is not as "harsh". These are the same tires that the fellas used on their 370z Nismo performance project car in the recent issue of or Nissan Sport.
See ya
Steve