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http://dx.doi.org/10.7776/ASK.2009.28.2.127

Speech Intelligibility Analysis on the Laser Detected Sound of the Glass Windows  

Kim, Seock-Hyun (강원대학교 기계메카트로닉스공학부)
Lee, Hyun-Woo (강원대학교 기계메카트로닉스 대학원)
Kim, Hee-Dong (한국외국어대학교 정보통신공학과)
Publication Information
The Journal of the Acoustical Society of Korea / v.28, no.2, 2009 , pp. 127-134 More about this Journal
Abstract
In this study, possibility of the laser eavesdropping is investigated on the window glasses with various thicknesses, Glass windows are excited by maximum length sequency (MLS) signal and the vibration sound is detected by a laser doppler vibrometer. From the detected sound, speech intelligibility is objectively estimated. Speech transmission index (STI), which is based on the modulation transfer function (MTF). is calculated for the estimation. Finally, disturbing wave effect on the speech intelligibility is analysed by using an outside speaker and a window shaker attached on the glass window. The purpose of the study is to estimate the possibility of remote eavesdropping by the laser sensor and to evaluate the performance of the homemade window shaker to protect from the remote eavesdropping.
Keywords
Speech intelligibility; Modulation Transfer function; Speech transmission index; Laser eavesdropping; Window shaker;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
연도 인용수 순위
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