First off I have an 04 rsx type s. As I'm driving down the road, in a straight line at 40+ MPH, I hear a knocking noise from the driver front area. The sound speed stays consistent as I increase in speed or RPMs (the pattern does not change). If I'm stationary there is no noticible noise. Also I hear the noise when rolling in neutral. Only when I hit my brakes does the noise stop, and it stops immediately. When I release the brake it starts again. I really don't have a clue what it may be so do any of you on here have an idea? Any helpful input will be greatly appreciated.