Sycurity system and method using measurement of acoustic field variation

The invention determines the presence or absence of the intruding object from the sound source generating unit and through the correlation between the sound signal obtained from the sound field changes measurement device and measuring the sound field of a certain space, by using the difference between the initially set the sound field and the changed sound field constant space It relates to a system and method for secure. According to the present invention the security system includes a field change measuring device that measures the sound generation device, a sound field formed by the sound source for generating a sound source, and compares the initial set up the sound field and the sound field measurement detects whether intrusion occurs. Sound, security, monitoring,