Setpoint of reverberation time

The reverberation time T(s) is the period of time it takes for a signal in a room to drop by 60dB. The value aimed for the reverberation time (Tsoll) at average frequencies depending on the kind of usage and the effective volume of space V can be seen on the picture to the left.

A1: Music
A2: Language
A3: Teaching/communication
A4: Teaching/communication inclusive
A5: Sports

T = 0.163 ⋅ V / A
T (s) = reverberation time
V (m3) = volume of space in total
A (m2) = equivalent sound absorption surface

The equivalent sound absorption surface A (m2) equals the sum of the partial surfaces multiplied with their known sound absorption coefficientαai (-) plus the sound absorption of objects respectively the persons within the space.

Sound absorption surfaces

LIGNATUR elements with bore holes or slits and installed sound absorption panels can be used as acoustic elements. Please refer to the following diagrams for the statistical sound absorption coefficients achieved with LIGNATUR acoustic elements, measured as per DIN EN ISO 354. The absorbing surfaces have to be distributed evenly to the overall surface. Examples of correct distributions are shown here. We are happy to test the fulfilment of required acoustic quality for the spaces you planned according to DIN 18041 when using LIGNATUR acoustic elements.