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

2020 ◽  
Vol 12 (20) ◽  
pp. 8666
Author(s):  
Dimitra Tsirigoti ◽  
Christina Giarma ◽  
Katerina Tsikaloudaki
Keyword(s):  
Energy Performance ◽  
Bearing Steel ◽  
Sound Insulation ◽  
Frequency Noise ◽  
Indoor Environmental Quality ◽  
Exterior Surface ◽  
Acoustic Performance ◽  
Insulation Materials ◽  
Acoustic Comfort ◽  
Insulation Performance

The complicated nature of indoor environmental quality (IEQ) (thermal, visual, acoustic comfort, etc.) dictates a multi-fold approach for desirable IEQ levels to be achieved. The improvement of building shells’ thermal performance, imposed by the constantly revised buildings’ energy performance regulations, does not necessarily guarantee the upgrade of all IEQ-related aspects, such as the construction’s acoustic quality, as most of the commonly used insulation materials are characterized by their low acoustic performance properties. From this perspective the SUstainable PReconstructed Innovative Module (SU.PR.I.M.) research project investigates a new, innovative preconstructed building module with advanced characteristics, which can, among other features, provide a high quality of acoustic performance in the indoor space. The module consists of two reinforced concrete vertical panels, between which the load bearing steel profiles are positioned. In the cavity and at the exterior surface of the panel there is a layer of thermal insulation. For the scope of the analysis, different external finishing surfaces are considered, including cladding with slate and brick, and different cavity insulation materials are examined. The addition of Phase Change Materials (PCM) in different mix proportions in the interior concrete panel is also examined. For the calculation of the sound insulation performance of the building module the INSUL 9.0 software is used. The results were validated through an experimental measurement in the laboratory in order to test the consistency of the values obtained. The results indicate that the examined preconstructed module can cover the sound insulation national regulation’s performance limits, but the implementation of such panels in building constructions should be carefully considered in case of lower frequency noise environments.

Research on the Insulation Performance of Sound-Isolating and Decoupled Tiles

2013 ◽  
Vol 457-458 ◽  
pp. 703-706 ◽  
Author(s):  
De Jin Qian ◽  
Xue Ren Wang ◽  
Xu Hong Miao
Keyword(s):  
Large Scale ◽  
Acoustic Radiation ◽  
Single Point ◽  
Mechanical Vibration ◽  
Sound Insulation ◽  
Acoustic Performance ◽  
Operating Modes ◽  
Insulation Effect ◽  
Vibration And Sound Radiation ◽  
Insulation Performance

The acoustic performance of sound-isolating and decoupled tiles is studied from macroscopic and microscopic. First, the sound absorption and reverse sound insulation performance of sound-isolating and decoupled tiles is studied based on laminated media; then the acoustic decoupling materials influence on acoustic radiation of double cylindrical shell underwater is studied, using a double-layer cylindrical structure of large-scale as experimental model .There are large amount of operating modes designed in this experiment, such as all laying, partial laying, laying and so on. The results show that sound-isolating and decoupled tiles not only have the effect of weakening the absorption of reflections, but also have reverse sound insulation effect, which increases as frequency increases; for single point mechanical vibration, the tiles can effectively inhibit vibration and sound radiation of high frequency in the double shell.

scholarly journals Spaces in-between impacts on indoor environment and energy efficiency in dwellings

2019 ◽  
Vol 282 ◽  
pp. 02071
Author(s):  
Catarina F. T. Ribeiro ◽  
Nuno M. M. Ramos ◽  
Inês Flores-Colen
Keyword(s):  
Energy Consumption ◽  
Indoor Environment ◽  
Minimum Energy ◽  
Environmental Parameters ◽  
Holistic Approach ◽  
Energy Performance ◽  
Indoor Environmental Quality ◽  
Climatic Regions ◽  
Minimum Energy Consumption ◽  
Acoustic Comfort

Throughout history, it has always been recognised that the spaces in-between in dwellings have the advantage of working as environmental buffer spaces. The aim of this paper is to provide a literature review of the different spaces in-between in dwellings – balconies, shaded balconies and glazed balconies - and their impacts on comfort and on energy performance. The effects of the spaces in-between depend on their design, on the characteristics of the buildings and on the surroundings. They have important impacts on the four factors that contribute to the indoor environmental quality: thermal comfort, lighting comfort, acoustic comfort and indoor air quality. These factors are interrelated and the lack of balance between them can lead to poor indoor environmental conditions and to excessive energy consumption. Based on the review, a synthesis of the key environmental parameters that can be used as indicators for those factors is established. The impacts of spaces in-between on the factors and sub-factors of indoor environment are defined, considering different climatic regions. A holistic approach that conciliates all the above-mentioned factors should be a contribution to the design of spaces in-between in both new construction and rehabilitation projects, in order to achieve better indoor environment with minimum energy consumption.

Impact sound transmission: experiments of control at the receiver room

2021 ◽  
Vol 263 (1) ◽  
pp. 5595-5599
Author(s):  
Davi Akkerman ◽  
Paola Weitbrecht ◽  
Mariana Shieko ◽  
Marcel Borin ◽  
Leonardo Jacomussi
Keyword(s):  
Social Housing ◽  
Sound Transmission ◽  
Field Tests ◽  
Sound Level ◽  
Sound Insulation ◽  
Total Cost ◽  
Acoustic Performance ◽  
The Impact ◽  
Insulation Performance

Considering Impact sound level requirements accomplishment in Brazil, floating floors are still considered as an inviable solution for building companies due to the implications in the total cost of building, mainly for social housing. Alternative and sometimes cheaper solutions are those undertaken in the receiver room. However, the lack of laboratory and field tests on the acoustic performance of this type of system is still a barrier for acoustic designing in Brazil. The aim of this paper is to study and validate different constructive solutions developed jointly with building companies for improving the impact sound insulation performance on the receiving room of new Brazilian housing constructions.

Indoor environmental quality assessment: Part 1: Choice of the indoor environmental quality sub-component models

2017 ◽  
Vol 41 (3) ◽  
pp. 264-289 ◽  
Author(s):  
Michał Piasecki ◽  
Krystyna Kostyrko ◽  
Sławomir Pykacz
Keyword(s):  
Environmental Quality ◽  
Indoor Air ◽  
Indoor Environment ◽  
Energy Performance ◽  
Indoor Environmental Quality ◽  
Quality Model ◽  
Metrological Analysis ◽  
Environmental Quality Assessment ◽  
Comfort Perception ◽  
Acoustic Comfort

Indoor environment quality is a relative measure of comfort perception by people exposed to the indoor conditions. It is expected that any assessment of energy performance should also include indoor comfort. This study is to review indoor environmental quality models (with respect to thermal and acoustic comfort, indoor air and lighting quality). A simplified indoor environmental quality model is also developed with consideration of EN 15251 draft ‘Guideline for using indoor environmental input parameters for the design and assessment of energy performance of buildings’. This article analyses what components should be modelled and in particular discusses the effect of different weighting schemes on the overall indoor environmental quality index. The analysis includes thermal comfort models, indoor air quality, acoustic comfort and daylight illumination versus lightning. The proposed indoor environmental quality component sub-models will give the most reliable results when the model indoor environment input data are correctly measured and disturbing influences of indoor environmental quality monitoring process are well defined and properly assessed. The final indoor environmental quality result is based on subjoining the uncertainty values achieved in panel analysis of percentage of persons dissatisfied with indoor environmental quality with corrected measurement uncertainty. All simulations for IEQindex sub-components and preliminary metrological analysis of the whole indoor environmental quality model were performed with the NIST program for Monte Carlo tests. The presented indoor environmental quality model proposal is developed to support engineers’ practice as the convenient tool for a practical assessment of building’s occupational satisfaction.

scholarly journals Preparation and Sound Insulation Performance of Superfine Metal Powder/Nitrile-Butadiene Rubber-Polyvinyl Chloride Microcellular Foaming Material

2019 ◽  
Vol 2019 ◽  
pp. 1-8
Author(s):  
Sheng Hu ◽  
Jun Cai ◽  
Guofeng Liao ◽  
Qiang Fu
Keyword(s):  
Metal Powder ◽  
Polyvinyl Chloride ◽  
Sound Insulation ◽  
Butadiene Rubber ◽  
Average Pore ◽  
Insulation Materials ◽  
Nitrile Butadiene Rubber ◽  
Microcellular Foaming ◽  
The Matrix ◽  
Insulation Performance

Lightweight sound insulation materials have received much attention. In this study, a series of superfine metal powder (SFM)/nitrile-butadiene rubber (NBR)-polyvinyl chloride (PVC) microcellular foaming materials were prepared with NBR-PVC as matrix and SFM as modifiers by employing the method of molding foaming. Analysis on the morphology of cross section, pore size, and pore distribution possessed by SFM/NBR-PVC was conducted by scanning electron microscopy (SEM), as well as the image processing software of Image-Pro. Then detailed discussion on the effect of SFM with different mass fractions in the matrix on the foaming quality was provided. In the meanwhile, the performance of sound insulation was tested by four-channel impedance tube system. The results show significant improvement for foaming quality and sound insulation performance of NBR-PVC microcellular foaming material through the addition of SFM. In comparison with the pure NBR-PVC materials, the microcellular foaming material exhibits the best performance of foaming quality and sound insulation when the SFM content in matrix is 30 wt%. It is shown that the average pore diameter and the foaming capacity decrease by 60% and 31%, respectively, while the surface density increases by 131%. In the meantime, the sound insulation index of SFM/NBR-PVC microcellular material increases by 7.2 dB to 30.5 dB, which conforms to the requirements of new lightweight sound insulation materials in modern time. Finally, the mechanism of the optimization conducted for sound insulation performance after the addition of SMF is explained.

scholarly journals Research on the Sound Insulation Properties of Membrane-type Acoustic Metamaterials

2021 ◽  
Vol 252 ◽  
pp. 02028
Author(s):  
Jinyu Hao ◽  
Sheng Guo ◽  
Jian Cheng ◽  
Zhaopin Hu ◽  
Hongyu Cui
Keyword(s):  
Cell Structure ◽  
Sound Insulation ◽  
Frequency Noise ◽  
Acoustic Metamaterials ◽  
Medium Frequency ◽  
Low Frequencies ◽  
Acoustic Metamaterial ◽  
Membrane Type ◽  
Insulation Performance ◽  
Excessive Noise

Low- and medium-frequency noise from ship cabins is difficult to control effectively. Excessive noise can seriously affect the acoustic stealth performance of ships. A novel membrane-type acoustic metamaterial is proposed in this paper with light weight and good sound insulation performance at low frequencies. The sound insulation performance of the metamaterial structure is analysed by using the acoustic-solid coupling module in COMSOL software. Then, the ability to change the sound insulation performance of membrane-type acoustic metamaterials with cell structure and material parameters is obtained. The research results in this paper provide powerful technical support for noise control in ship cabins.

Research on Aluminum Alloy Foam Sound Insulation Characteristics of New Decorative Building Materials

2013 ◽  
Vol 380-384 ◽  
pp. 4219-4223
Author(s):  
Ying Yang
Keyword(s):  
Aluminum Alloy ◽  
Theoretical Basis ◽  
Building Materials ◽  
Materials Science ◽  
Sound Insulation ◽  
Analysis Model ◽  
Acoustic Characteristics ◽  
Insulation Materials ◽  
Materials Research ◽  
Insulation Performance

Due to its unique physical sound insulation performance, aluminum alloy foam has become one of the new decorative building materials. Research on its sound insulation performance has also become a hot topic of materials science and other fields. Firstly, the paper analyzes the acoustic characteristics and the analysis indicators of sound insulation materials through the analysis of aluminum alloy foam characteristics and sound insulation mechanism. It finally concludes impact factor of sound insulation based on the analysis model of physical characteristics of aluminum alloy foam and sound insulation mechanism which provides a theoretical basis for the application and development of the sound insulation materials in a certain extent.

Multi-mass synergetic coupling perforated bi-layer plate-type acoustic metamaterials for sound insulation

2020 ◽  
Vol 34 (13) ◽  
pp. 2050136
Author(s):  
Weikang Huang ◽  
Tianning Chen ◽  
Quanyuan Jiang ◽  
Xinpei Song ◽  
Wuzhou Yu ◽  
...  
Keyword(s):  
Structural Parameters ◽  
Perforated Plate ◽  
Low Frequency ◽  
Sound Insulation ◽  
Frequency Noise ◽  
Acoustic Metamaterials ◽  
Practical Engineering ◽  
Broadband Sound ◽  
Insulation Performance ◽  
Plate Type

Thin plate-type acoustic metamaterials have the advantages of lightweight, high rigidity and adjustable parameters, showing great practical application values in sound wave control. In this paper, a type of perforated bi-layer plate-type acoustic metamaterials (PBPAM) is designed for low-frequency noise control. The sound insulation peaks can be increased by combining the perforated plate and synergetic masses, making the sound insulation performance close to the mass law at the resonant frequency. Compared to the results predicted by the mass law, a better performance of sound insulation is achieved based on the PBPAM. The effects of the structural parameters are investigated in this study. Based on the impedance tube experiments, the measured results have a good agreement with the simulated ones. This work can provide a reference for low-frequency and broadband sound insulation based on plate-type acoustic metamaterials in practical engineering.

Selection of Insulation Materials and Insulation Performance with Consideration of Building Energy when Designing a Building

2015 ◽  
Vol 752-753 ◽  
pp. 724-727
Author(s):  
Young Sun Jeong
Keyword(s):  
South Korea ◽  
Energy Saving ◽  
Building Materials ◽  
Residential Buildings ◽  
Building Energy ◽  
Energy Performance ◽  
Insulation Material ◽  
Design Standards ◽  
Insulation Materials ◽  
Insulation Performance

Building designs should be reviewed from the aspects of both design aesthetics and energy performance. The installation of insulation materials in external walls, roofs, and floors is a basic method that could reduce energy losses from buildings. The purpose of this study is to investigate the types of insulation materials selected as building materials and the insulation performance of each building elements when designing new buildings in South Korea. The insulation performance of the external walls, roofs, and floors of buildings were compared with the insulation criteria of the Energy Saving Design Standards of Buildings in building energy code. The design documents, as well as drawings and building energy saving plan sheets, which are required to be submitted for buildings larger than a certain size in South Korea, were collected. The most widely used insulation material in multi-family housings and non-residential buildings was extruded polystyrene (XPS). The insulation performance of external walls, roofs, and floors were higher than that established by design criteria of building energy code. In particular, the external walls had roughly a 25.5% better insulation performance than the insulation criteria.

Improving building envelope performance with respect to thermal, sound insulation, and lighting: a case study

2019 ◽  
Vol 26 (4) ◽  
pp. 243-262
Author(s):  
Shahryar Habibi
Keyword(s):  
Energy Performance ◽  
Building Envelope ◽  
Sound Insulation ◽  
Indoor Environmental Quality ◽  
The Novel ◽  
Existing Building ◽  
Energy Retrofit ◽  
Overall Evaluation ◽  
Indoor Comfort

This study concerns an overall evaluation of building envelopes, for what concerns the energy, acoustic and lighting performances. It combines different topics of energy and indoor comfort, with the aim to improve the livability of an existing building (a social housing) by means of a comprehensive retrofit of their envelopes. The novel contribution of this study is to apply some methods for energy retrofit of a building envelope in such a way that objectives are achieved within the state-of-the-art combination simulation, optimization approaches, and equations describing the calculations of sound insulation in buildings. The results showed that properties of building envelope like the value of transmittance of the glass window and thermal properties of materials have an impact on indoor environmental quality and energy performance.

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