Removed the hum from cognito-perceptu's pill-bottle-4 sample. Original sample had truck in background in addition to some low frequency hum. Used the remove hum feature on izotope rx2 and, presto-chango, no distracting background noise. Now there is still a high frequency hum which i did not touch. I think this could be mitigated with a low pass filter in eq if you choose.
Author: Hubyduby