Optimizing classroom acoustics using computer model studies

Authors

  • Rebecca Reich Natl Research Council, Ottawa, Canada
  • John Bradley Natl Research Council, Ottawa, Canada

Keywords:

Acoustic noise, Acoustic wave absorption, Architectural acoustics, Computer simulation, Optimization, Sound insulating materials, Classroom acoustics, Software package ODEON

Abstract

Speech intelligibility in rooms is determined by both room acoustics characteristics as well as speech-to-noise ratios. These two types of effects are combined in measures such as useful-to-detrimental sound ratios which are directly related to speech intelligibility. This paper reports investigations of optimum acoustical conditions for classrooms using the ODEON room acoustics computer model. By determining conditions that relate to maximum useful-to-detrimental sound ratios, optimum conditions for speech are determined. The results show that an optimum mid-frequency reverberation time for a classroom is approximately 0.5 s, but speech intelligibility is not very sensitive to small deviations from this optimum. Speech intelligibility is influenced more strongly by ambient noise levels. The optimum location of sound absorbing material was found to be on the upper parts of the walls.

Published

1998-12-01

How to Cite

1.
Reich R, Bradley J. Optimizing classroom acoustics using computer model studies. Canadian Acoustics [Internet]. 1998Dec.1 [cited 2021Jun.25];26(4):15-21. Available from: https://jcaa.caa-aca.ca/index.php/jcaa/article/view/1179

Issue

Section

Technical Articles