Environmental noise control during its transmission phase to protect buildings. Design model for acoustic barriers based on arrays of isolated scatterers

Abstract

ElsevierCastiñeira Ibáñez, S.; Rubio Michavila, C.; Sánchez Pérez, JV. (2015). Environmental noise control during its transmission phase to protect buildings. Design model for acoustic barriers based on arrays of isolated scatterers. Building and Environment. 93:179-185. doi:10.1016/j.buildenv.2015 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. M A N U S C R I P T A C C E P T E D ACCEPTED MANUSCRIPT 1 ENVIRONMENTAL NOISE CONTROL DURING ITS TRANSMISSION PHASE TO PROTECT BUILDINGS. DESIGN MODEL FOR ACOUSTIC BARRIERS BASED ON ARRAYS OF ISOLATED SCATTERERS.Sergio Castiñeira-Ibañez, Constanza Rubio*, Juan Vicente Sánchez-Pérez ABSTRACTA new generation of acoustic barriers is being introduced into the noise control market. These barriers, based on arrays of isolated scatterers, present interesting properties to be used in cities to reduce the transmitted transport noise affecting buildings. Among them, both aesthetic and continuity factors of the urban landscape may be mentioned. This new kind of barrier is technologically advanced and acoustically competitive with respect to the current ones formed by continuous rigid materials. To design these barriers whilst taking into account their inherent acoustic complexity, we present an overlapping numerical model here that enables us to split the real three-dimensional problem into two two-dimensional ones, allowing both the reduction of the computational cost and the separate analysis of each one of the noise control mechanisms involved. We analyse different cases, checking the numerical simulations with accurate experimental results.

An experimental study on the acoustic characteristics of outdoor spaces surrounded by multi-residential buildings

“…The first approach is to reduce background noise from external noise sources such as road traffic, and the second approach is to reduce background noise from internal noise sources such as human voices in the outdoor spaces. The majority of noise abatement schemes have mainly adopted the first approach related to reducing background noise from the external noise sources such as traffic noise by means of noise barriers as well as by the building layout such as introducing courtyards [2][3][4][5][6][7]. This conventional approach is based on the concept that a lower background noise could help residents to feel less stressed.…”

Recent Developments in Sonic Crystals as Barriers for Road Traffic Noise Mitigation

“…The reflection properties have been further investigated and connected to the sonic crystal band structures [31]. At present, most of the research is focused on studying different methods to increase the Bragg's law frequency attenuation range, by adding to the sonic crystal particular absorbent materials [32] or using Helmholtz resonators as scatterers [33].…”

Development and investigation of protective properties of the electromagnetic and soundproofing screen

“…The situation is similar in the field of development of soundproofing (acoustic) screens). Most of the screens to protect against aircraft noise and noise of automobile transport are the thin hard surfaces whose efficiency is predetermined by the diffraction phenomena at the edges of the screens [7]. The efficiency of a screen, based on the physical properties of a material, was partly considered in [8].…”