Need title: 'hum' movie
 

Unknown release date, I'd guess 1995-2005.

North America, rural, small town.

Nothing much happens, there's just this low-level background hum and a sense of growing threat.

Thanks.

You just described almost every horror movie made during that time period.

The best I can come up with is Yellowbrickroad from 2010.

No, not Yellowbrickroad. But thanks for the suggestion.