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http://dx.doi.org/10.5050/KSNVN.2007.17.9.888

The Effect of the Disturbing Wave on the Speech Intelligibility of the Eavesdropping Sound of a Window Glass  

Kim, Seock-Hyun (강원대학교 기계메카트로닉스공학부)
Kim, Hee-Dong (한국외국어대학교 정보통신공학과)
Heo, Wook (강원대학교 대학원 기계메카트로닉스공학과)
Publication Information
Transactions of the Korean Society for Noise and Vibration Engineering / v.17, no.9, 2007 , pp. 888-894 More about this Journal
Abstract
The speech sound is detected by the vibration measurement of the window glass. In this study, we investigate the effect of the disturbing waves by background noise and window shaker excitation on the speech intelligibility of the detected sound. Based upon Modulation Transfer Function(MTF), speech intelligibility of the sound is objectively estimated by Speech Transmission Index(STI) As the level of the disturbing wave varies, variation of the speech intelligibility is examined. Experimental result reveals how STI is influenced by the level and frequency characteristics of the disturbing wave. By using a customized window shaker for disturbing sound, we evaluate the efficiency and the frequency characteristics of the anti-eavesdropping system. The purpose of the study is to provide useful information to prevent the eavesdropping through the window glass.
Keywords
Speech Intelligibility; Modulation Transfer Function; Speech Transmission Index; Eavesdropping; Disturbing Wave; Widow Shaker;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
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4 IEC, 2003, 'Sound System Equipment-Part 16 : Objective Rating of Speech Intelligibility by Speech Transmission Index', IEC 60268-16, 3rd edition
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7 http://www.OldB-stell.com. Intelligibility Criteria: Measurement Method. dBBATI32 Application Note , MVI Technologies Group
8 http://www.tscm.co.kr. Korea TSCM
9 Kim, Y. H., Kim, H. D. and Kim, Y. H., 2007, 'Speech Intelligibility Analysis on the Vibration Sound of the Glass Windows of a Conference Room', Transactions of the Korean Society for Noise and Vibration Engineering, Vol. 17, No. 4, pp. 363-369   과학기술학회마을   DOI   ScienceOn