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. The paper contains
and the calibration system of microphones mounted on the device.
Cuvinte cheie: tubul de impedanţă, determinarea erorilor
Keywords: impedance tube, the determination of errors
