Classrooms with shorter reverberation times lead to a much better signal-to-noise ratio while requiring less vocal effort from teachers

The study presented here is the most extensive, systematic study to examine the impact of reducing reverberation in a working school environment. By installing varying acoustic treatments in three similar classrooms it has been possible to investigate the true effects of different acoustics in occupied schoolrooms. The three classrooms, plus an untreated room, were compared both objectively through acoustic measurements and subjectively through surveying the opinions of pupils, teachers and other adults. The results demonstrate conclusively the benefits to all of improving the acoustic environment.


Source: David Canning, Adrian James. The Essex Study- Optimised classroom acoustics for all. The Association of Noise Consultants.May 2012.
http://www.acousticbulletin.com/EN/Essex_Final%20report%20V4_28_05_12.pdf
Voir aussi : http://www.acousticbulletin.com/EN/Ecophone_Essex_6ppA4_v8_LO_Singles.pdf

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