Maybe I'm just hyper-sensitive to all these weird sounds and noises, but I've started noticing a faint noise within the cabin that I can best describe as a "hollow wind tunnel", kind of like the sound you'd expect if you were blowing over the top of a glass coke bottle. The sound will usually be present at speeds higher than 30, and is worsened when driving over more uneven road services. Crossing lane markings or driving over the road reflectors will emphasize the sound too. I wasn't able to capture the sound recorded on my iPhone yet - not even sure it would show up since its relatively faint compared to the actual wind and tire roar. Any ideas? Anyone heard it before or know what it might be?