About two weeks ago I started noticing a grinding noise coming from my front right tire every time I would go over this certain gradation outside my workplace. I would hit the bump, I would hear the noise, which is a higher pitched metal on metal sound, then hit a bump again and it would go away. It started happening more frequently recently and is now pretty much constant. It's usually worsened by using the brakes. Sometimes it goes away completely, usually until I hit a bump.

Also, if I tap the breaks, sometimes the noise disappears also. Does anybody have any idea what is causing this?

note: My last breakjob was about a year ago.

 

I'm no expert, and I don't claim to be one, but I think it sound like you have a problem with your brakes. Do you have disc brakes in the front? ( I assume you do) but you might want to take a peek and see if something is loose, or you should take it back to the shop for a checkup.