EDT and RT: "The uniformity and no-uniformity in the distribution of absorption in a reverberant room is it a discussion between them?"

In this publication we will study the behavior of a reverberant room analydifferent cases: (a) Placing in a floor a little sample of absorption, and (b) Placing the same sample of absorption distributed in three mutually perpendicular walls. In addition, we will analyze the results obtained using the following formulas of the theories: Sabine, Eyring, and Arau*. The first two theories are designed for uniform distribution and the third theory was developed assuming the existence of no-uniform absorption in a room. We will compare the results of the calculated reverberation time RT with the three theories, Sabine, Eyring and Arau* and we also compare the results of the reverberation time of Arau* with the results of the EDT (Early Decay Time), always calculated also by Arau's theory, because the other theories don't calculate it.