SECURITY SYSTEM BY COMDENSER MICROPHONE

Abstract

Keeping the life in secure state is one of the important items in the modern society. Unfortunately, modern people must pay effort to keep their life secure. The conventional security system includes variety of security sensors for variety of dangers. This fact leads to the system expensive and complicated. In this research work, we presented one sensor security system. We employed a small condenser microphone as the sensor and investigated how widely it can be applied for variety of dangers. The symptoms by variety of dangers are easily discriminated by applying filters because the changes in the pressure due to the symptoms have the vibrations in the different frequency ranges.