Acoustic defects – acoustic defects are a common phenomenon that occurs in individual rooms. Each room has its own acoustic defects, which cannot be avoided even if an acoustician is involved at the design stage. Acoustic defects have a direct impact on the quality of sound propagation in a given room and auditory sensations, for example during lectures in an auditorium or musical concerts. The most common acoustic defects include:
echo – this acoustic defect causes a repetition of direct sound. We can speak of echo in a room when this sound reaches the listeners only after 100 milliseconds or more from its emission;
flutter echo – this defect occurs most frequently in rooms. It is a fluttering echo, in which the heard sound resembles the flapping of an animal’s wings;
comb filter – this defect is most often found in small rooms. In spatially limited rooms, sounds reflect off flat walls and then overlap.
