In this diploma work we describe the acoustic treatment of existing drill room into listening room. In the theoretical part we get to know the basic terms/notions such as sound in general, how the scale and the sound level are defined and how people detect the sound. Then we explain the phenomena that occur by sound propagation and the problems connected with sound propagation in a closed room. We also recognize different acoustic elements, some of them are later used in acoustic treatment of our room.
First we take the measurements of the existing state then we define and analyse the existing problems. On this basis, we decide for further actions, even the change of the form of the room itself. By determining a new orientation and arrangement of loudspeakers, we proceed with acoustic layout and acoustic elements. The biggest problem of each closed room are modal frequencies which are most difficult to master, so we tackle those first. We begin with resonant absorbers, step-by-step with a single reflecting surface (the front wall first, then the back wall followed by side walls and finally the ceiling) and each time the intermediate measurements are taken in order to analyse what was achieved by treatment of a certain surface. By mobile porous absorbers we eliminate also the side reflections and by diffusion of the back wall we try to extend the echo of middle and high frequencies which was shortened too much while treating the room by absorbers. By this, we finish with the acoustic treatment, we present the achieved results and describe the planned upgrades which are meant to improve even more the sound picture of the room.
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