Scenario analysis is used for the simulation of the physical protection system (PPS) by considering several credible intrusion and defense scenarios. A practical interaction simulator is developed for the scenario analysis of the PPS. The interaction simulator integrates all discrete subsystems of the PPS to form an intermodulation chain of intrusion-detection-response-interruption. https://www.farmingtondepotgallery.com/product-category/horns-and-blowers/