Bonfiglio P., Prodi N., Pompoli F.

Thanks to the recent advances in the miniaturized anemometer technology, particle velocity (u) sensors are now replacing the conventional approach using p – p probes and the finite difference method. So, new p-u probes can be assembled by matching a ¼’’ condenser microphone and a novel u sensor. This hybrid probe can be effectively calibrated and serve as the basis for the intensimetric study of the acoustical properties of sound absorbing materials. In particular both the energetic and the full complex behaviour can be described thanks to a modified energetic transfer matrix approach. In this work the combined probe and its applications will be developed and discussed.