[villagetinker]

The bedrooms are equipped with Arc Fault detecting circuit breakers, these are different from GFCI circuit breakers, and tend to be more sensitive. They are designed to detect an arcing fault in extension or lamp cords etc.
So try unplugging everything in the bedroom, then plug in one item at a time and see when the breaker trips. Try moving the wires or shaking the device. If there is a loose connection, it will probably cause the breaker to trip.
Then, replace the item, or have a professional repair it.
You MIGHT be able to pick up electrical noise using an AM radio tuned to an area with no radio signal, walk around and if you hear a noise it should get louder as you get closer.
Please remember, the primary function of these breakers is the trip for a defective cord or appliance that is arcing, and could be a fire hazard. Do not ignore this situation or replace the breaker with a regular breaker, or we might be reading about you in the paper......