Reverberation time graph

The Java source code of this applet and its documentation are freely available.


  • A program draws a reverberation time(RT60) graph of a certain room at different frequencies.

  • The algorithm is based on the following formula:

    RT60 = k * (V/Sa)

    k is a constant that equals 0.161 when the units of measurement are expressed in meters and 0.049 when in feet. V is the volume of a room, Sa is the total surface absorption of a room which is a sum of all the surface areas multiplied by their repective absorption coefficients. The absorption coefficients can be obtained from the Table of absorption coefficients.