Subjective Evaluation of Classroom Acoustics by Teenagers vs. Reverberation Time
P. Leśna and E. Skrodzka
Institute of Acoustics, Adam Mickiewicz University, Umultowska 85, 61-114 Poznań, Poland
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A questionnaire was developed to evaluate acoustics in classrooms. The group of 279 pupils from 7 schools in age from 11 till 17 years were tested. The subjective evaluation was accompanied by objective measurements of reverberation time in 11 classrooms. The questionnaire was based on five point differential scales and consisted of six questions about acoustic comfort, teacher voice clarity, speech comprehension, evaluation of different noise sources intensity, annoyance and consequences of noise in the classroom. The results of statistical analysis of subjective answers and physical measurements of reverberation time were correlated. After analysis it was found that clarity of teacher voice and speech comprehension scores lowered for increasing reverberation time and was not statistically significant. Acoustic comfort score was also lower for increasing reverberation time but only in a group of pupils older than 12 years. For children under 12 years the results of questionnaire's analysis were not so clear as for older pupils.
DOI: 10.12693/APhysPolA.118.115
PACS numbers: 43.55 Hy