Exorcized Items

When a particular object is exorcized and blessed, during the exorcism the priest asks God to drive the demons away by means of the object.  The very exorcism of the object makes it repugnant to the demons.  If one also blesses it, the object contains a twofold aspect to it that the demons abhor. When bells are exorcized, they are like any other exorcized item: the demons find them repugnant.  However, in the exorcism of a bell, the ritual mentions two aspects to the bells.  The first is that the bells are a call to the people to preparing for and adoring God.  The second is it would drive away demons in their various activities when the bell is heard.  By sounding the exorcized bell, in effect, the exorcism is transmitted through the air and drives the demons out.  ~Fr. Chad Ripperger