The DENORMS Round Robin Test (RRT) on low-frequency sound absorption of materials has been completed, and data for all the involved European laboratories have been post-processed and analyzed. A large number of recordings from 12 very diverse reverberation rooms are available, either obtained with time reversal mirror or interrupted pink noise techniques. This paper presents an overview of the reverberation time values obtained in the different facilities and a study of empty-room results. The experimental data show a correlation between the measured reverberation time and the room features, embodied by the volume-to-absorbing surface ratio. The behavior of the rooms in different frequency ranges is also explored to identify possible information to be used in the interpretation of sound absorption measurements.
The denorms round robin test: Analysis of the preliminary results of the time data post-processing
Piana E. A.;
2021-01-01
Abstract
The DENORMS Round Robin Test (RRT) on low-frequency sound absorption of materials has been completed, and data for all the involved European laboratories have been post-processed and analyzed. A large number of recordings from 12 very diverse reverberation rooms are available, either obtained with time reversal mirror or interrupted pink noise techniques. This paper presents an overview of the reverberation time values obtained in the different facilities and a study of empty-room results. The experimental data show a correlation between the measured reverberation time and the room features, embodied by the volume-to-absorbing surface ratio. The behavior of the rooms in different frequency ranges is also explored to identify possible information to be used in the interpretation of sound absorption measurements.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
