KIEAE Journal

  • 제7권3호
  • /
  • Pages.63-70
  • /
  • 2007
  • /
  • 2288-968X(pISSN)
  • /
  • 2288-9698(eISSN)
한국생태환경건축학회 (Korea Institute of Ecological Architecture and Environment)
권호 표지

초기 수직반사음의 역할을 고려한 새로운 명료도 지표

A new acoustical parameter for speech intelligibility with regard to early vertical reflections

  • 박종영 (목포대학교 대학원) ;
  • 한명호 (목포대학교 친환경건축연구센터) ;
  • 정대업 (전북대학교 공과대학 건축공학과) ;
  • 오양기 (목포대학교 건축학과)
  • 발행 : 2007.06.29
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초록

It is known that early reflections, their energy and delay times after the arrival of direct sound are important factors for speech intelligibility. In this basis, acoustical parameters like D50 and C80 had been proposed and are widely used for assessing the listening condition of rooms. These parameters are focused on the fraction of the early energy to the total, regardless of the spatial characteristics of the early reflections. This means that all the early reflections, arrived in certain time boundary. from front, behind, down and upside have the same impact on speech intelligibility. From the questionable simplicity, the influence of the direction of early reflections on speech intelligibility is examined in this study. A computer simulation speech intelligibility test, conducted for 22 university students, found that the reflection of vertical direction with method of the Paired comparison also the preference of 0.746 degree was visible an increase.

키워드

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