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Research Article

Analysis of the acoustical conditions in active classrooms based on the speech and noise levels

실시간 학습현장의 음성 및 소음 레벨을 바탕으로 한 재실 음향특성 분석

Young-Ji Choi1*
최 영지1*
1강원대학교 건축공학전공
*Corresponding Author
30 September 2024. pp. 517-528
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Abstract

This paper reports the results of a recent acoustic survey conducted with the objective of providing on the acoustic conditions of school classrooms in Korea. The measurements included both occupied speech and noise levels during 27 active classes and unoccupied data on the acoustical conditions, and sound insulation performance in 16 classrooms in 4 schools. The effects various parameters on the speech and noise levels in occupied classrooms has been examined. The impact of room acoustic design on speech and noise levels in active classrooms has been also investigated. The speech and noise levels of the elementary school are approximately 4 dBA to 5 dBA higher than those of the other three schools (junior high, high, and special), likely due to the nature of activities involved in group work and the age of the students. A notable 19 dBA difference is observed between the quietest and noisiest classroom activities and the classrooms in which students were observed working in groups with discussion had the highest noise levels. Both occupied and unoccupied data have enabled the establishment of a comprehensive picture of the acoustic conditions in classrooms and have highlighted the necessity of introducing acoustic standards for improving the acoustic environment in Korean schools.

Keywords
Classroom acoustics
Speech and noise levels
Acoustic standards
Active classrooms
Background noise
Reverberation times
Noise isolation

본 논문에서는 국내 학교 교실에서 실시한 현장측정을 바탕으로 음향상태 결과를 제시하였다. 측정결과에는 실시간 27곳 수업현장의 음성 및 소음 레벨과 4개 학교 16곳 공실의 실내음향상태 및 차음성능결과를 포함하고 있다. 수업 중 음성 및 소음 레벨에 영향을 미치는 여러 인자를 조사하였고, 실내 음향이 재실 음향상태에 미치는 영향에 관해 분석하였다. 재실자 연령과 수업 활동 특성에 따른 영향으로 국내 초등학교의 수업 중 평균 음성 및 소음 레벨은 중·고등학교와 특수학교 보다 약 4 dBA ~ 5 dBA 높게 나타났다. 수업 활동 특성에 따른 소음 레벨값 차이는 최대 19 dBA이며, 그룹 활동을 병행한 수업에서 가장 높은 소음 레벨을 나타냈다 . 공실 및 재실 음향상태 측정결과는 국내 교실의 음향상태를 파악 가능하게 하였으며, 국내 학습공간의 특성을 반영한 음향설계기준 제정의 필요성을 강조하였다.

키워드
교실 음향
음성 및 소음 레벨
음향 기준
실제 학습현장
배경소음
잔향시간
차음
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Information
  • Publisher :The Acoustical Society of Korea
  • Publisher(Ko) :한국음향학회
  • Journal Title :The Journal of the Acoustical Society of Korea
  • Journal Title(Ko) :한국음향학회지
  • Volume : 43
  • No :5
  • Pages :517-528
  • Received Date : 2024-07-16
  • Revised Date : 2024-09-02
  • Accepted Date : 2024-09-08
  • DOI :https://doi.org/10.7776/ASK.2024.43.5.517
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