The acoustic comfort of classrooms in a Brazilian public school has been evaluated through interviews with 62 teachers and 464 pupils,
measurements of background noise, reverberation time, and sound insulation. Acoustic measurements have revealed the poor acoustic
quality of the classrooms. Results have shown that teachers and pupils consider the noise generated and the voice of the teacher in
neighboring classrooms as the main sources of annoyance inside the classroom. Acoustic simulations resulted in the suggestion of
placement of perforated plywood on the ceiling, for reduction in reverberation time and increase in the acoustic comfort of the
classrooms.