SECURITY SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide a security system capable of exerting a threat effect even on an intruder experienced in ordinal alarm sounds.SOLUTION: A security system 1 comprises warning units 3 and 5 that emit a voice alarm w when an intruder I is detected within a security object area. Plural alarm emission times t1- t4 are set to emit a voice alarm w as time passes. The voices emitted at alarm emission time t1-t4 include alarm sentences X1-X4 different from each other for causing an intruder's mind a physical pressure.