Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
Experimental Study of a Piezoelectric Device to Control the Sound Absorption Coefficient
Submission Author:
Fabiana Pereira , MG
Co-Authors:
Fabiana Pereira, Israel Jorge Cardenas Nunez, Geisa Zuffi, Marcus Antonio Duarte
Presenter: Fabiana Pereira
doi://10.26678/ABCM.COBEM2019.COB2019-2251
Abstract
This work presents a piezoelectric sound absorber that can be applied in many different environments, including cleanroomss. The proposed device aims to improve the sound absorption through the vibrations control of a piezo buzzer coupled to a thin aluminum plate. Several tests were conducted in an impedance tube, under plane wave propagation condition, at frequencies between 200 and 1000 Hz, using a fixed controller implemented in Simulink/Matlab and a USB-6259 board from National Instruments. The results show the effectiveness of the proposed system for improving the absorption coefficient of the system.
Keywords
Absorption Coefficient, Piezoelectric, Vibration control
