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Conference Paper
Active Localization of a Silent Intruder using Acoustic Imaging in Anechoic Space
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- Authors
- Kihyun Kim, Daesung Kim, Homin Ryu, Semyung Wang, Sung Q Lee, Kang-Ho Park
- Issue Date
- 2012-07
- Citation
- Internaltional Congress on Sound and Vibration (ICSV) 2012, pp.1-8
- Language
- English
- Type
- Conference Paper
- Abstract
- This paper mainly addresses an active localization technique of a silent intruder with audible frequency and its application to acoustic imaging. Source localization techniques using a microphone array have been developed for speech localization, analyzing noise sources of products in industry, and tracking a target signal. However, localization techniques of a silent intruder are also necessary to get spatial information in a closed space. It is possible to make acoustic imaging visually in the targeted spatial distribution and distinguish the spatial changes from such acoustic imaging in building security systems. To localize a silent intruder using acoustic imaging, we set a strategy to estimate the angle and distance of a silent intruder in targeted security space. First, a microphone array and a loudspeaker are fixed at the same position. Second, burst sine is generated in non-intrusion and the measured signals from a microphone array are considered as reference signals, then also measured signals in intrusion are thought of as intrusion signals. Third, the deconvolution technique is used to extract reflected signals resulted in intrusion using reference signals and intrusion signals. Fourth, beamforming and beam steering with the reflected signals are applied to make acoustic imaging. We considered a silent intruder as an object, a PVC pipe, and tested the proposed technique to find locations of a PVC pipe in an anechoic chamber.
- KSP Keywords
- Acoustic imaging, Active Localization, Anechoic Chamber, Closed space, Microphone arrays, Noise sources, PVC pipe, Reflected signals, Source Localization, Spatial distribution, beam steering