Sound Insulation

Average reverberation time - Equivalent absorption area

In a building's acoustic measurements the average reverberation time is often referred to.

This average reverberation time is calculated from the average, frequency by frequency, of reverberation times measured in different room positions. Such measurements are repeated moving the sound source in various positions, according to form and dimension of the room tested.

The number of points considered depends on the tested room's form and dimensions.

Repeat the measurement (please see Reverberation Measurement) in multiple points, and download the data from the sound level meter to the PC using NoiseStudio.

Now, in the NoiseStudio software, select "Analyze -> SOUND INSULATION -> Start Analysis", select the "Average Reverberation Time - Equivalent absorption area" type of measurement, and press OK.

You should create a new project containing all files concerning the processing or open an existing one.

Create the project "tempo_riverbero".

This opens average reverberation time calculation window:

Select one of the time parameters (T10, T20, T30 or EDT) to calculate the average.

The norm ISO 3382 recommends using T30 when possible, or T20.