Elnemr Y., Elnady T.

Reverberation rooms are often used in a number of standard acoustic measurements such as sound power, sound absorption, and sound installation. In standards, like ISO, it is described how to check or measure the validity of a certain room to decide if it qualifies for performing standard measurements. There is no complete guide that can be found in the literature on how to design a room so that it qualifies as a standard reverberation room. A standard reverberation room is not just a closed space with hard walls that has a long reverberation time. Each room has to be optimized within the available space to guarantee a good distribution of the acoustic modes in each octave band. The main idea is to obtain a diffuse field distribution of the acoustic pressure, and to achieve a high modal density within each frequency band. The room can be designed to achieve these requirements using a Finite Element Method using commercial software. The eigen frequencies of the room can be calculated as a first step. The next step is to simulate a source inside the room and calculate the pressure distribution. There are also some other geometrical considerations have to be followed. The present paper describes the procedure of designing reverberation rooms applied on the design of a room at ASU Sound and Vibration Lab., Ain Shams University in Cairo.