Acoustic Behavior in Three Types of Housing: Brick Social Housing, Structural Insulated Panel (SIP) Emergency Housing and Mediagua Emergency Housing

Garay, Rose Marie; Pino, G Nidia

doi:10.7764/rdlc.18.1.96

Cited by 6 publications

(5 citation statements)

References 4 publications

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“…For compliance, there are two ways: using the official list of constructive solutions of the Ministry of Housing and Urban Planning or through tests of the acoustic reduction index based on the NCh 2786 standard and acoustic impact pressure according to ISO 140-6 and ISO 717-2 [41]. The tests must be carried out by authorized laboratories registered in the Official Registry of Quality Control Laboratories of the MINVU.…”

Section: Regulatory Requirements For Wooden Structuresmentioning

confidence: 99%

Quality and Sustainability Indicators of the Prefabricated Wood Housing Industry—A Chilean Case Study

et al. 2021

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Wood industrialization provides a contribution to timber-based building. The Chilean market is based on attributes such as the experience and trust of companies. The sales price, meeting deadlines and quality are attributes that have motivated buyers. There are more attributes to assess that are important for the client and market country: building materials and safety, sustainability, and environmental assessment. Some of these valuations are provided by certifications such as life cycle analysis, reduction of energy, water, gas consumption, thermal, acoustic insulation, fire resistance, etc. The objective is to propose an evaluation tool using sustainability indicators for prefabricated lumber-based buildings, using technical benefits of wood as an option for manufacturing prefabricated structures. They constitute references that can be integrated with international construction standards and with it, a process of improvement of the current standards for the housing solution and protection of the environment. The methodology is based on standards compliance levels, according to current, voluntary, or referential regulations, seeking to differentiate the market offer of prefabricated homes through quality indicators, benchmarking and sustainability. The results are an evaluation model synthesized into three tables according to the category evaluated: materials, products, or structures. It concludes that, to meet demand, the market must adapt its offer to new requirements where it does matter how the housing is produced, not only in the economic aspect, but also its impact on the social aspect and the environment and what it offers in terms of quality of life. The lumber-based building sector needs sustainability attributes indicators to potentiate the companies and start a differentiation business.

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Section: Regulatory Requirements For Wooden Structuresmentioning

confidence: 99%

Quality and Sustainability Indicators of the Prefabricated Wood Housing Industry—A Chilean Case Study

et al. 2021

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“…Acoustic absorbers, such as plastic foams or fibrous materials [1][2][3][4], are widely used for sound insulation, passive sound control [1], and noise reduction in the aeronautical and building industries [5]. These materials have the particularity of being porous [6,7] and consisting of a solid phase and a fluid phase, the fluid part generally being saturated with air.…”

Section: Introductionmentioning

confidence: 99%

Transient Propagation of Spherical Waves in Porous Material: Application of Fractional Calculus

Fellah

Roncen

et al. 2022

Symmetry

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A fractional-order wave equation is established and solved for a space of three dimensions using spherical coordinates. An equivalent fluid model is used in which the acoustic wave propagates only in the fluid saturating the porous medium; this model is a special case of Biot’s theory obtained by the symmetry of the Lagrangian (invariance by translation and rotation). The basic solution of the wave equation is obtained in the time domain by analytically calculating Green’s function of the porous medium and using the properties of the Laplace transforms. Fractional derivatives are used to describe, in the time domain, the fluid–structure interactions, which are of the inertial, viscous, and thermal kind. The solution to the fractional-order wave equation represents the radiation field in the porous medium emitted by a point source. An important result obtained in this study is that the solution of the fractional equation is expressed by recurrence relations that are the consequence of the modified Bessel function of the third kind, which represents a physical solution of the wave equation. This theoretical work with analytical results opens up prospects for the resolution of forward and inverse problems allowing the characterization of a porous medium using spherical waves.

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“…The prediction of acoustic attenuation in air-saturated porous media allows one to anticipate the control of noise pollution in the fields of housing [10], aeronautics [11], cars, urban transport [12][13][14][15][16] and public space [17]. Several methods have been developed for the characterization of air saturated porous materials [1,[18][19][20][21][22][23][24][25][26][27][28][29][30][31][32] and more particularly the so-called acoustic methods, based on the experimental detection of waves transmitted and/or reflected by the porous material [33][34][35][36][37].…”

Section: Introductionmentioning

confidence: 99%

Influence of Higher Order Viscous and Thermal Effects on an Ultrasonic Wave Reflected from the First Interface of a Porous Material

et al. 2022

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Ultrasound propagation in porous materials involves some higher order physical parameters whose importance depends on the acoustic characteristics of the materials. This article concerns the study of the influence of two parameters recently introduced, namely, the viscous and thermal surfaces, on the acoustic wave reflected by the first interface of a porous material with a rigid structure. These two parameters describe the fluid/structure interactions in a porous medium during the propagation of the acoustic wave in the high-frequency regime. Both viscous and thermal surfaces are involved in Laurent expansion, which is limited to the dynamic tortuosity and compressibility to a higher order and corrects the visco-thermal losses. A sensitivity study is performed on the modulus of the reflection coefficient at the first interface as a function of frequency and on the waveforms reflected by the porous material in the time domain. The results of this study show that absorbent porous materials are the most sensitive to viscous and thermal surfaces, which makes the consideration of these two parameters paramount for the characterization of highly absorbent porous materials using the waves reflected from the first interface.

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Acoustic Behavior in Three Types of Housing: Brick Social Housing, Structural Insulated Panel (SIP) Emergency Housing and Mediagua Emergency Housing

Cited by 6 publications

References 4 publications

Quality and Sustainability Indicators of the Prefabricated Wood Housing Industry—A Chilean Case Study

Quality and Sustainability Indicators of the Prefabricated Wood Housing Industry—A Chilean Case Study

Transient Propagation of Spherical Waves in Porous Material: Application of Fractional Calculus

Influence of Higher Order Viscous and Thermal Effects on an Ultrasonic Wave Reflected from the First Interface of a Porous Material

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