Civic - Honda :: 2010 - Metallic Shrieking Noise While Moving

I have a 2010 Honda Civic (automatic transmission) that has about 38K miles on it. For months now, it has been making a very gentle metallic rattling noise after going over bumps and at highway speeds on our "rougher" roads (crappy PA highways). I took it to a Honda dealer about 10K miles ago, and had them inspect the heat shields and take it for a road test, but they found nothing and said the heat shields were fine. I was content to turn up the radio a bit and ignore it (sometimes Hondas just rattle). Today, however, I turned a corner on a residential street and suddenly heard a metallic shrieking noise coming from the right front of the car that didn't go away until the car came to a full stop.

I turned the car off and took it for a quick spin around the parking lot I was in, and it continued to make the noise when the car was moving... forward and reverse. It got louder the faster the car went. Disturbed, I called a tow truck and had it taken to the Honda dealer, who will examine it tomorrow when they reopen. The last time my brakes were checked, which was only a few months ago, I was told that the front brakes were 8s and the rear brakes were at 4, so I don't think the pads are worn down yet.

I don't know if the soft metallic rattle and this noise are related, but they're coming from the same area of the car. It is getting inspected and having an oil change tomorrow as well, since both are due very soon. I know I will find out tomorrow, but I was hoping someone could put my mind at ease and settle my curiousity as to what this might be. There was nothing hanging down from the bottom of the car and making contact with the road, and there are no maintenance lights or other lights lit on the dash. It has been a well-behaved car so far, but it only has 38K miles on it.