Transactions of the Korean Society for Noise and Vibration Engineering (한국소음진동공학회논문집)

The Korean Society for Noise and Vibration Engineering (한국소음진동공학회)
권호 표지
DOI QR코드

DOI QR Code

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

교란파가 유리창 진동음의 음성명료도에 미치는 영향

  • 김석현 (강원대학교 기계메카트로닉스공학부) ;
  • 김희동 (한국외국어대학교 정보통신공학과) ;
  • 허욱 (강원대학교 대학원 기계메카트로닉스공학과)
  • Published : 2007.09.20
Download PDF
⟨ Previous Next ⟩

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

References

  1. Kim, S. H., Kim, H. D. and Kim, J. H., 2007, 'Intelligibility Analysis of the Eavesdropping Sound of Glass Windows Using MTF-STI', Journal of the Acoustical Society of Korea, Vol. 26, No. 1, pp. 8-15
  2. 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 https://doi.org/10.5050/KSNVN.2007.17.4.363
  3. Houtgast, T. and Steeneken, H. J. M. 1973 'The Modulation Transfer Function in Room Acoustics as a Predictor of Speech Intelligibility', Acoustica, Vol. 28, pp. 66-73
  4. Steeneken, H. J. M. and Houtgast, T., 1980, 'A Physical Method for Measuring Speech Transmission Quality', Journal of Acoustical Society of America, Vol. 67, pp. 318-326 https://doi.org/10.1121/1.384464
  5. IEC, 2003, 'Sound System Equipment-Part 16 : Objective Rating of Speech Intelligibility by Speech Transmission Index', IEC 60268-16, 3rd edition
  6. Anderson, B. W. and Kalb, J. T., 1987, 'English Verification of the STI Method for Estimating Speech Intelligibility of a Communications Channel', Journal of Acoustical. Society of America, Vol. 81, No. 6, pp. 1982-1985 https://doi.org/10.1121/1.394764
  7. Rife, D. D., 1989, 'Transfer-function Measurement with Maximum-length Sequences', J. Audio Eng. Soc., 37, pp. 419-444
  8. http://www.OldB-stell.com. Intelligibility Criteria: Measurement Method. dBBATI32 Application Note , MVI Technologies Group
  9. http://www.tscm.co.kr. Korea TSCM