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Wednesday, July 10 • 18:10 - 18:30
EVALUATION OF SOUND ABSORPTION: AN EXPERIMENTAL COMPARATIVE STUDY AMONG REVERBARATION ROOM, IMPEDANCE TUBE AND AIRFLOW RESISTIVITY-BASED MODELS

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Sound absorption of materials is a fundamental quantity in many fields of applied acoustics and material science and technology. The determination of the sound absorption has been widely investigated throughout the last decades, on the basis of experimental methods and empirical models, and recently an important revision of ISO standard method for the measurement of sound absorption in a reverberation room is under investigation. In general terms, although the sound absorption determined in reverberation room is commonly recognized as the more representative of the actual acoustical behavior of a material, different methods allow to evaluate the dissipative properties of permeable materials as well, namely the sound absorption in impedance tube and several empirical models based on the airflow resistivity. In this paper experimental results obtained from measurements in reverberation room and in impedance tube and from models based on airflow resistivity, according to the-state-of-the-art and to the current standards methods, are presented and compared along with associated uncertainties.

Moderators
EA

Edoardo Alessio Piana

PhD, University of Brescia
OR

Olivier Robin

Research professional, Groupe d'acoustique de l'université de Sherbrooke
avatar for Bert Roozen

Bert Roozen

prof.dr.ir., KU Leuven
CS

Chiara Scrosati

MSc in Physics, Construction Technologies Institute ITC of the National Research Council of Italy

Authors

Wednesday July 10, 2019 18:10 - 18:30 EDT
Westmount 4
  T08 Mat. for noise & vibr. cntrl., SS04 Chrctrz of ac materials