한국소음진동공학회:학술대회논문집 (Proceedings of the Korean Society for Noise and Vibration Engineering Conference)
- 한국소음진동공학회 2010년도 추계학술대회 논문집
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- Pages.187-192
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- 2010
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- 1598-2548(pISSN)
가청 주파수대 음장 변화 측정 기반 침입 감지 기술
Intrusion detection based on the sound field variation of audible frequency band
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이성규
(한국전자통신연구원) ;
- 박강호 (한국전자통신연구원) ;
-
양우석
(한국전자통신연구원) ;
-
김종대
(한국전자통신연구원) ;
- 김대성 (광주과학기술원) ;
- 김기현 (광주과학기술원) ;
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왕세명
(광주과학기술원)
-
Lee, Sung-Q.
;
- Park, Kang-Ho ;
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Yang, Woo-Seok
;
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Kim, Jong-Dae
;
- Kim, Dae-Sung ;
- Kim, Ki-Hyun ;
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Wang, Se-Myung
- 발행 : 2010.10.27
초록
In this paper, intrusion detection technique based on the sound field variation of audio frequency in the security space is proposed. The sound field formed by sound source can be detected with the microphone when the obstacle or intruder is positioned. The sound field variation due to the intruder is based on the interference of audio wave. With the help of numerical simulation of sound field formations, the increase or decrease of sound pressure level is analyzed not only the obstacle, but also the intruder. Even the microphone is positioned behind the source, sound pressure level can be increase or decrease due to the interference. Frequency response test is performed with Gaussian white noise signal to get the whole frequency response from 0 to half of sampling frequency. There are three security cases. Case 1 is the situation of empty space with and without intruder, case 2 is the situation of blocking obstacle with and without intruder, and case 3 is the situation of side blocking obstacle with and without intruder. At each case, the frequency response is obtained first at the security space without intruder, and second with intruder. From the experiment, intruder size of