Design of Device for Determination of the Sound Absorbtion Coefficient



This paper presents a constructive variant of acoustic impedance tube used to determine the coefficient of sound absorption materials. This alternative design brings a contribution in terms of the number of microphones mounted on the tube impedance control of acoustic vibration generator, with the calibration system of microphones mounted on the device. (© 2012 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim)