Prediction of airborne sound and impact sound insulation provided by single and multilayer systems using analytical expressions

Abstract

In this work, the authors use analytical solutions to assess the airborne sound and impact insulation provided by homogeneous partitions that are infinite along their plane. The algorithm uses Green's functions, derived on the basis of previous work by the authors on the prediction of airborne sound insulation provided by single and double panels. The model is now extended to handle multilayer systems, allowing the simulation of three-dimensional loads applied in both the acoustic and solid media.The model is validated against experimental results and compared with simplified expressions for single, double and triple panels. The results provided by the analytical model were found to provide a good agreement with the experimental results, except in the vicinity of the coincidence effect in the presence of thicker panels.The applicability of the proposed tool is then illustrated by analyzing the acoustic behavior provided by single layers and by a suspended ceiling. Different variables are studied, such as the mass, the stiffness of the layers, the position and direction of the load within the elastic medium and the presence of porous material in the fluid layers. It was found that the model is able to simulate the acoustic phenomena involved in single and multilayer systems.

Active control of noise through open windows

“…From the simulation with a plane wave at 0 incidence, the full glazing performance 1 GR TL = increases uniformly across all frequencies as thickness w L increases. Performance decreases rapidly with increasing wavelength, when the wavelength is larger than the size of the aperture, L m. Results from the FEM simulation for 0.003 w L = m agrees with the measured data from past experiments using the reverberation chamber method as described in ISO 10140 [Quirt, 1982;Tadeu et al, 2007;Tadeu and Mateus, 2001;Yu et al, 2017]. To form a basis of comparison to the full-scale model, the size of the aperture is fixed at Kong [Tong et al, 2015].…”

Indoor Acoustic Comfort Provided by an Innovative Preconstructed Wall Module: Sound Insulation Performance Analysis

“…Therefore, its prediction is not straight forward. Several efforts dealing with the prediction and the assessment of the sound insulation capacity of such partitions have been reported in the literature, regarding either the approaches-numerical or otherwise-generally employed or studies of specific types of construction [14][15][16][17][18][19][20]. Other researchers have also investigated the sound insulation performance of double leaf walls incorporating both acoustic and structural transmission paths and have tried to determine their performance in low and high frequencies [20].…”

Transmission of Sound Through Finite Multiple-Panel Partition

“…Kropp et al [19] addressed the optimization of sound insulation of doublepanel constructions by dividing the frequency range into three cases, i.e., where the double wall resonance frequency is much higher (or closer or much lower) than the critical frequency of the total construction. Recently, Tadeu et al [20] adopted an analytical method to assess the airborne sound and impact insulation properties of single-and double-leaf panels by neglecting the elastic boundary conditions. Bao and Pan [31] presented an experimental study on active control of sound transmission through double walls with different approaches, including cavity control, panel control, and room control.…”