The Effect of Direct Field Component on A Statistical Energy Analysis (SEA) Model

• Main Authors: Putra, Azma, Munawir, Al, Mohamad, W. M. F. W., Mohammad, J. I
• Format: Article
• Language: English
• Published: Trans Tech Publications 2014
• Subjects: TJ Mechanical engineering and machinery
• Online Access: http://eprints.utem.edu.my/id/eprint/10724/1/The_EFfect_of_Direct_Field_Component_on_A_Statistical_Energy_Analysis.pdf; http://eprints.utem.edu.my/id/eprint/10724/
• Institution: Universiti Teknikal Malaysia Melaka

Statistical Energy Analysis (SEA) is a well-known method to analyze the flow of acoustic and vibration energy in a complex structure. The structure is divided into subsystems where the energy in each of the subsystem is assumed to be reverberant. This study investigates the application of SEA model in a 'damped' acoustic space where the direct field component from the sound source dominates the total sound field rather than a diffuse field in a reverberant space which the SEA model assumption is based on. A measurement was conducted in a scaled room divided into two acoustic spaces separated by a partition with an opening. Absorbent materials were installed on the room walls and the power injection technique was implemented to obtain the coupling loss factor (CLF) of the system. It is found that correction of the direct field component from the subsystem energy improves the prediction of the CLF of the system.