What makes a sound "eerie"

[DavidSnider]

Any ideas why droning sounds, echos, etc give us the creeps?

[lisab]

I don't think those sounds are inherently creepy, but we've been conditioned by scary movies to associate them with creepiness.

[Pattonias]

I would say that it is a sound that you can not immediately identify and induces feelings of panic or worry. A sound that stimulates your fight or flight response perhaps.