Comparative Study of Sound Transmission Losses of Sandwich Composite Double Panel Walls

Chukwuemeke William Isaac,Stanislaw Wrona,Marek Pawelczyk

doi:10.3390/app10041543

Chukwuemeke William Isaac, Stanislaw Wrona + Show 1 more

Open Access

https://doi.org/10.3390/app10041543

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Journal: Applied sciences	Publication Date: Feb 24, 2020
Citations: 29	License type: CC BY 4.0

Affiliation: Silesian University of Technology

Abstract

The increasing motivation behind the recently wide industrial applications of sandwich and composite double panel structures stems from their ability to absorb sounds more effectively. Meticulous selection of the geometrical and material constituents of both the core and panels of these structures can produce highly desirable properties. A good understanding of their vibro-acoustic response and emission index such as the sound transmission loss (STL) is, therefore, a requisite to producing optimal design. In this study, an overview of recent advances in STL of sandwich and composites double panels is presented. At first, some salient explanation of the various frequency and controlled regions are given. It then critically examines a number of parameter effects on the STL of sandwich and composite structures. Literatures on the numerical, analytical and experimental solutions of STL are systematically presented. Efficient and more reliable optimization problems that maximize the STL and minimize the objective functions capable of degrading the effectiveness of the structure to absorb sounds are also provided.

Highlights

The reduction of noise through vibro-acoustic panels has become an interesting area of research in the past few decades
A critical overview of the sound transmission loss of sandwich and composite double panel configurations investigated by several contemporary researchers has been presented in this review article
The sound transmission loss (STL) as a vibro-acoustic index has been used to measure the potential of materials to absorb sounds transmitted through them

Summary

Introduction

The reduction of noise through vibro-acoustic panels has become an interesting area of research in the past few decades. The double panel structures (DPS) have gained popularity over their single panel counterparts owing to their better sound insulation properties and industrial applications over a wide frequency range. Their vibro-acoustic characteristics can still be improved to give better sound absorbing performance. The cavity or core between the two face-sheets can be architecturally supported or/and filled with some sound insulation materials [4,8] In this way, optimal double panel structural design can be adopted for different applications.

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