engleski

Evaluation of acoustical suitability of lecture rooms with respect to the quality of the sound reinforcement system and the level of background noise

In order to evaluate acoustical suitability of several lecture rooms located on the Faculty of EE and Computing in Zagreb, Croatia, a questionnaire was given to the students who take their classes in those particular rooms. The first part of the investigation is focused on the quality of sound reinforcement system located in two largest lecture halls, to be replaced in the near future with a new one of significantly better quality. The goal is to examine whether this change is reflected in the grades of acoustical suitability given by the students. The second part of the examination deals with two smaller lecture rooms of identical size and acoustic treatment, but with significantly different levels of background noise due to positions of these rooms relative to the nearby street as the source of traffic noise. The overall level and spectral content of noise are measured in these lecture rooms. In addition, speech intelligibility is examined in all four rooms. The results of these measurements are then interpreted with respect to the subjective grades given by the students.

acoustical suitability; lecture rooms; sound reinforcement system; background noise

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