Monoaural and Binaural Classroom Acoustics for the Assessment of Speech Comprehension in Primary-School Children

The paper presents the results of monoaural and binaural acoustic measurements and speech-intelligibility tests conducted in two classrooms representative of typical school buildings in Italy. The sample of two classrooms was selected based on a statistical analysis of reverberation time measurements taken in more than one hundred Italian schools. In the two sample classrooms, measurements were taken both when the room was empty and when it was occupied by pupils. The binaural measurements were conducted on two students who were fitted with special headphones equipped with binaural microphones, with sound sources placed in various positions within the classroom, both in the acoustically untreated classroom (with a long reverberation time) and in the acoustically treated classroom (with a short reverberation time). The results of the speech intelligibility tests conducted on 25 elementary school students confirmed that speech intelligibility improves significantly in the acoustically treated classroom.