Well...some attribute the hum to the underground cities. Especially the New Mexico hum, since Dulce is fairly widely accepted as having a huge underground scenario going on, as in, where aliens have lived for 450 years. Not the nice aliens, either. I don't live far from Sedona, another place with very frequent ufo and alien entity activity seen. Plus, if you venture into certain areas in the surrounding mountains and splendid rock formations, all of a sudden you have military types telling you to leave, post haste. I think there is a base underground in red rock country. Do I care? Not really. I just want the deception to stop. Does Sedona hum? There isn't much of anything that has not been heard there.