If an audio plays in the room and no one is there to hear it, does it still make a sound? 
I have read that the ambient ones (fields for the atmosphere or environment) will have an effect, yes.
But for physical changes or others intended for a person, I am not sure.
Without any specific programming or energetic work done that intends for the fields to be imbued into objects, I think the mechanism is for them to work only on living beings.