The present invention can print out operating instructions, HELP documents, the latest image forming apparatus information, support and maintenance information, advertisements about new models and services, and the like without incrementing a charging counter. A sensor mounted in the headrest feeds back the location of an occupant’s head to a system controller. The subject’s acoustic startle response is obtained and used to determine whether the subject detected the alteration of the sound pattern. The amount of certainty is attained from the network node being located in a known secure location, andor from verification of the physical location of the network node by using satellite geolocation techniques or by using network ping ranging measurements. Additionally, the melting temperature of the core material is higher than the material of the outer layer.