Here's the clip in question: http://vocaroo.com/i/s1xA7Rw9OBJ8
At around :10 the noise begins, a low thrumming sound. It's probably a car driving by, you can hear a doppler effect. I've tried the Parametric Equalizer with no success. Any suggestions as to how I should approach this problem?
I'd be willing to use another (free) audio editing program to get rid of it, but I'd prefer to use Audition.