SECURITY SYSTEM AND METHOD USING MEASUREMENT OF ACOUSTIC FIELD VARIATION
First Claim
1. A security system using measurement of acoustic field variation, the security system comprising:
- a sound source generating device for generating a sound source; and
a sound-field variation measuring device for measuring a acoustic field formed by the sound source inside a certain space, and comparing the measured acoustic field with an initially set acoustic field when the sound source is generated, to determine whether there is an intrusion in the certain space.
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Accused Products
Abstract
A security system and a method of determining whether there is an intrusion are provided. A correlation between sound signals obtained from a sound source generating device and a sound-field variation measuring device is used to measure a acoustic field in a certain space. A difference between an initially set acoustic field and a changed acoustic field is used to determine whether there is an intruding object in a certain space. The security system includes a sound source generating device for generating a sound source; and a sound-field variation measuring device for measuring a acoustic field formed by the sound source, wherein an initially set acoustic field is compared with the measured acoustic field to determine whether there is an intrusion.
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Citations
14 Claims
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1. A security system using measurement of acoustic field variation, the security system comprising:
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a sound source generating device for generating a sound source; and a sound-field variation measuring device for measuring a acoustic field formed by the sound source inside a certain space, and comparing the measured acoustic field with an initially set acoustic field when the sound source is generated, to determine whether there is an intrusion in the certain space. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A security method using measurement of acoustic field variation, the security method comprising;
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generating a sound source; measuring a acoustic field formed by the sound source inside a certain space; setting an initial transfer function of the acoustic field to the sound source; intermittently or continuously measuring the acoustic field formed by the sound source to detect a transfer function; and comparing the initial transfer function with the detected transfer function to determine whether there is an intrusion inside the certain space. - View Dependent Claims (13, 14)
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Specification