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

The Korean Society for Noise and Vibration Engineering (한국소음진동공학회)
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Speech Intelligibility Analysis on the Vibration Sound of the Glass Window of a Conference Room

회의실 유리창 진동음의 음성 명료도 분석

  • 김희동 (한국외국어대학교 정보통신공학과) ;
  • 김윤호 (강원대학교 대학원 기계메카트로닉스공학과) ;
  • 김석현 (강원대학교 기계메카트로닉스공학부)
  • Published : 2007.04.20
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Abstract

The purpose of the study is to obtain acoustical information to prevent eavesdropping of the glass window. Speech intelligibility was investigated on the vibration sound detected from the glass window of a conference room. Objective test using speech transmission index(STI) was performed to estimate quantitatively the speech intelligibility. STI was determined based on tile modulation transfer function(MTF) of the room-glass window system. Using Maximum Length Sequency(MLS) signal as a sound source, impulse responses of the glass window and MTF were determined by signals from accelerometers and laser doppler vibrometer. Finally, speech intelligibility of the interior sound and window vibration were compared under different sound pressure levels and amplifier gains to confirm the effect of measurement condition on the speech intelligibility.

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References

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