Akademik Veri Yönetim Sistemi
38th International Congress and Exposition on Noise Control Engineering 2009, INTER-NOISE 2009, Ottawa, Kanada, 23 - 26 Ağustos 2009, cilt.1, ss.590-598
Acoustical characteristics of classrooms like reverberation times and background noise mainly define the speech intelligibility in classrooms. Excessive background noise deteriorates the signal to noise ratio and leads to reduction in learning efficiency. An extensive measurements study is being used in Istanbul Elementary Schools as part of a project. STI values of 4 different classrooms in 4 different elementary schools are measured in 9 different positions. This paper explains the results of the preliminary investigation of the influence of aircraft noise on speech intelligibility. Speech transmission index (STI) are used as the indicator of intelligibility and the ultimate acoustical conditions denoted by STI are investigated while windows were open and closed. To include the aircraft noise into comparisons, measurements were repeated during aircraft passing. The results are compared with the given national and international standards about classroom acoustics and revealed that all parameters are high above the required values.