The feedback, often times referred to as a buzzing sound, that is sometimes received from an audio or video device is called a ground loop. To solve this noise issue that can occur within the compartments of an audio or video mechanism it is best to use a ground loop isolator.

The isolation transformer can be connected to the system experiencing the ground loop. Once the isolator is connected it will work to break the ground path through cables that run between elements of the piece of equipment. The elimination of this noise matter can be extremely difficult to do away with so it may take a great deal of time and patience.