In modern life there is almost no moment in which sound does not generate some form of communication with external world. Increase of engineering and technology in architecture creates new possibilities in building construction. Use of new materials provides more efficient implementation of noise protection than ever before. At the same time diverse functions of buildings lead to new requirement for quality acoustic. Apart from describing basic characteristics of physical manifestations of the flow of sound through air, in the article we present improvement possibilities for room acoustics. Analysed are basic factors which determinate acoustic characteristics of rooms, and usage of absorption materials and elements that can improve acoustic of rooms.