Open Access

ARTICLE

Corrected Statistical Energy Analysis Model in a Non-Reverberant Acoustic Space

by Al Munawir¹, Azma Putra^2,*, Iwan Prasetiyo³, Wan Mohd Farid Wan Mohamad², Safarudin Herawan⁴

1 Jurusan Teknik Mesin, Universitas Teuku Umar, Meulaboh, 23615, Indonesia
2 Fakulti Kejuruteraan Mekanikal, Universiti Teknikal Malaysia Melaka, Melaka, 76100, Malaysia
3 Acoustic Laboratory, Department of Engineering Physics, Institut Teknologi Bandung, Bandung, 40132, Indonesia
4 Department of Industrial Engineering, Bina Nusantara University, Jakarta, 11480, Indonesia

* Corresponding Author: Azma Putra. Email:

Sound & Vibration 2021, 55(3), 203-219. https://doi.org/10.32604/sv.2021.015938

Received 25 January 2021; Accepted 26 May 2021; Issue published 15 July 2021

Abstract

Statistical Energy Analysis (SEA) is a well-known method to analyze the flow of acoustic and vibration energy in a complex structure. This study investigates the application of the corrected SEA model in a non-reverberant 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 classical SEA model assumption is based on. A corrected SEA model is proposed where the direct field component in the energy is removed and the power injected in the subsystem considers only the remaining power after the loss at first reflection. Measurement was conducted in a box divided into two rooms separated by a partition with an opening where the condition of reverberant and non-reverberant can conveniently be controlled. In the case of a non-reverberant space where acoustic material was installed inside the wall of the experimental box, the signals are corrected by eliminating the direct field component in the measured impulse response. Using the corrected SEA model, comparison of the coupling loss factor (CLF) and damping loss factor (DLF) with the theory shows good agreement.

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Keywords

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