Journal articles: 'Acoustical insulation'

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Bao, Xue Fang. "Human Resident Acoustical Environment and Acoustical Insulation of Residential Building." Applied Mechanics and Materials 368-370 (August 2013): 435–40. http://dx.doi.org/10.4028/www.scientific.net/amm.368-370.435.

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The development of economytraffic and industry have brought worse noise-pollution of city residences environment,the human residing acoustical environment quality is getting worse ,the development of green residential acoustical environment is extremely urgent .Dwelling houses sound insulation ability is one of important index of its quality. This text aim at the sound insulation problem because of light-weight wall being used at large, analyze the principle of sound insulation and optimize it ,briefly introduce the construction project of dwelling house sound insulation of light-weight wall by experiment contrast, expatiate on the technology measure of improving performance of light-weight wall.

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Moussa, Tala, Chadi Maalouf, Christophe Bliard, Boussad Abbes, Céline Badouard, Mohammed Lachi, Silvana do Socorro Veloso Sodré, et al. "Spent Coffee Grounds as Building Material for Non-Load-Bearing Structures." Materials 15, no. 5 (February 24, 2022): 1689. http://dx.doi.org/10.3390/ma15051689.

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The gradual development of government policies for ecological transition in the modern construction sector leads researchers to explore new alternative and low environmental impact materials with a particular focus on bio-sourced materials. In this perspective, the mechanical, thermal insulation, and the sound absorption performances of a spent coffee grounds/potato starch bio-based composite were analyzed for potential application in buildings. Based on thermal conductivity and diffusivity tests, the coffee grounds waste biocomposite was characterized as an insulating material comparable with conventional thermal insulation materials of plant origin. Acoustical tests revealed absorption coefficients in the same range as other conventional materials used in building acoustical comfort. This bio-sourced material presented a sufficient compressive mechanical behavior for non-load-bearing structures and a sufficient mechanical capacity to be shaped into building bricks. Mechanical, thermal, and acoustic performances depend on the moisture environment. The groundwork was laid for an initial reflection on how this composite would behave in two opposite climates: the continental climate of Reims in France and the tropical climate of Belém in Brazil.

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Dlhý, Dušan, and Peter Tomašovič. "Effects of the Sound Insulation of the Outer Structure on the Price." Applied Mechanics and Materials 820 (January 2016): 472–77. http://dx.doi.org/10.4028/www.scientific.net/amm.820.472.

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Manufacturers indicate sound insulation of envelope structures of different materials. Acoustical properties of manufactured openings as windows and doors (plastic, wooden, metallic) are known. Following theoretic relations for calculation of consequential sound insulation of acoustic composite wall Rw, it is possible to work out options of walls and openings of various materials.

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Dlhý, Dušan, and Peter Tomašovič. "Sound Insulation Determination of Door." Advanced Materials Research 1057 (October 2014): 215–22. http://dx.doi.org/10.4028/www.scientific.net/amr.1057.215.

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The structural complexity of a door causes difficulties in the description of its behavior from an acoustical point of view. In many cases, even a small change can cause a big difference in its sound-isolating properties. To determine the acoustical quality of a door, it is important to perform laboratory measurements of the door structure and door frame, the gaps including. A mathematical analysis based on experimental measurements of the sound reduction index of several door constructions was used to determine the acoustical door categories. The equations for calculating the sound reduction index, which were introduced in this paper, should help in the design of a suitable door from an acoustical point of view.

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Rawlinson, R. D. "Acoustic Design of Lightweight Gas Turbine Enclosures." Journal of Engineering for Gas Turbines and Power 113, no. 4 (October 1, 1991): 544–49. http://dx.doi.org/10.1115/1.2906275.

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Acoustic enclosures for the gas turbine industry have to comply with a number of stringent safety requirements including structural strength, fire resistance, and sound insulation. This has led traditionally to heavy enclosure designs. Corrugated enclosure panels offer significant structural advantages because of their increased bending stiffness. Consequently, a corrugated panel of a given thickness can give the same structural strength as a flat panel of substantially greater weight and thickness. However, corrugated panels are intrinsically less effective as a sound insulator than flat panels of the same thickness. This paper examines the implications of corrugated, lightweight panels for acoustic enclosures. It illustrated that, by careful design, the inherent acoustical disadvantages of corrugated panels can be overcome so that thinner, lighter, and more cost-effective enclosures can be used without compromising the overall structural and acoustical design requirements.

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da Silva Wunderlich, Priscila, Carolina Monteiro, and Juan de Frias Pierrard. "Interlaboratory and proficiency tests for buildings sound insulation field measurements in Brazil - 4th Edition 2020." INTER-NOISE and NOISE-CON Congress and Conference Proceedings 263, no. 2 (August 1, 2021): 4743–54. http://dx.doi.org/10.3397/in-2021-2824.

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Since 2013 ABNT NBR 15575:2013 entered into force in Brazil, a national technical standard that establishes acoustic requirements for dwellings, that can be verified by means of field measurements procedures performed according to specific ISO standards. Therefore, those requirements have fostered the acoustic field measurement market, and the number of laboratories has quickly increased across the county. ProAcústica - Brazilian Association for Acoustical Quality, a non-profit entity, aiming to improve the quality of the acoustics business in Brazil has organized in 2020 the fourth edition of the "Interlaboratory program of field measurements for building acoustics laboratories - INTERLAB Program". This consists of a fundamental tool for acoustic field laboratories to evaluate and verify the quality of their measurement results. This paper presents the methodologies and procedures used in the interlaboratory program, as well as the results of both the interlaboratory test and the proficiency carried out in São Paulo (Brazil) during 2017 by ProAcústica - Brazilian Association for Acoustical Quality. In this edition a total number of 25 laboratories have participated (32% more participants than the last edition in 2017) for different type of field tests: airborne sound insulation, airborne facade sound insulation, impact sound level, sound pressure level from service equipment in buildings, and reverberation time). The main objectives are the evaluation of the precision of the field test methods in the Brazilian market, and the analysis of the performance of the participating laboratories as a quality control tool.

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Yuen, K. C. Gary, B. K. David Yeung, K. F. Calvin Chiu, and C. M. Tony Cheng. "Applications of ventilation-enabling sound insulation devices based on mock-up test findings." INTER-NOISE and NOISE-CON Congress and Conference Proceedings 268, no. 5 (November 30, 2023): 3636–42. http://dx.doi.org/10.3397/in_2023_0515.

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Road traffic, railway and industrial noise sources are main challenges in maintaining satisfying acoustical environment for living habitat in Hong Kong. Ventilation-enabling sound insulation devices has been introduced to Hong Kong residential development in the aim of striking a good balance between indoor ventilation and sound insulation. In the form of windows and balconies, the sound insulation devices were applied to mitigate the potential road traffic, railway, and fixed noise impacts. The sound insulation performances of the devices were verified in a 1:1 mock-up test and indicated by in-out difference, which contributed from the outdoor and indoor noise levels. The in-out difference of the sound insulation devices varies with the adopted spectrum, depending on flat layout configurations. The enhancing performance of applied acoustic material to the sound insulation devices, and that of applied acoustic fin adjacent to the devices are also studied.

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Dlhý, Dušan. "The Effect of Free Joints on Sound Insulation of Constructions." Advanced Materials Research 855 (December 2013): 233–36. http://dx.doi.org/10.4028/www.scientific.net/amr.855.233.

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Noise protection of a building ́s interior is one of the fundamental functions of building constructions. These constructions can be understood as internal partitions, ceilings or external wall-/roof claddings. However, walls often consist of basic building materials and openings; such windows and doors as well as the acoustical properties of such structures are determined by both parts (e.g., a windows and the wall structure). The acoustical quality of opening is in general affected not only by the particular structure, but also by the concept of the mounting. Acoustical requirements should be applied in all its parts, such as the construction of the window (door) frame, window (door) wing and the realization of the functional gap as well as by application of a sealant. On the base of experimental measurements in Acoustics Chambers of the Faculty of Civil Engineering of Slovak Technical University and mathematical analysis we have determined index of sound insulation of free joint.

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Nurzyński, Jacek. "Acoustical assessment of urban residential environment." Budownictwo i Architektura 13, no. 4 (December 9, 2014): 033–40. http://dx.doi.org/10.35784/bud-arch.1690.

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The quality of urban residential environment depends on several factors, acoustical conditions are among the most important. Outdoor noise affects conditions inside the building, determines required sound insulation of external walls and the whole building envelope. It defines the comfort level on balconies and terraces, and also the quality of the closest building surroundings. Recent tendencies in spatial planning, related to the sustainable development idea, as rational land use, densification of existing built-up areas, revitalization of city centers etc, have possible far-reaching acoustical consequences. Besides, the environmental management and spatial planning present quite different attitude towards assessment of residential areas in terms of acoustics. The paper examines the problem of noise just from the perspective of spatial planning and building industry. The acoustic classification scheme is proposed for residential areas. It gives clear rules for acoustical planning and appropriate urban development policy. It is also an applicable tool for investors, developes, local authorities, and above all a final user to assess real quality and adequate value of the premises.

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Herreman, Kevin. "Modeling Industrial Pipe Insulation Performance." INTER-NOISE and NOISE-CON Congress and Conference Proceedings 263, no. 5 (August 1, 2021): 1548–54. http://dx.doi.org/10.3397/in-2021-1868.

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Reducing industrial noise emission utilizing jacketed pipe insulation is critical to reducing noise in industrial spaces. The ISO 15665 standard defines a testing process for measurement of the acoustical performance of installed and jacketed pipe insulation systems. However, the cost of testing per this standard, especially when using an external laboratory, can be very costly. That makes the development of a model to accurately estimate the performance of single, and multilayered, jacketed pipe insulation highly desirable. Utilizing a one-dimensional theoretical acoustic model along with empirical data, a model with sufficient accuracy to provide insertion loss results relative to the ISO 15665 standard was created. The creation and resulting functionality of the model for determining jacketed pipe insulation insertion loss and comparison of the resulting data to test results will be discussed herein.

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Begum, Hasina, and Kirill V. Horoshenkov. "Acoustical Properties of Fiberglass Blankets Impregnated with Silica Aerogel." Applied Sciences 11, no. 10 (May 18, 2021): 4593. http://dx.doi.org/10.3390/app11104593.

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It is known that aerogel impregnated fibrous blankets offer high acoustic absorption and thermal insulation performance. These materials are becoming very popular in various industrial and building applications. Although the reasons for the high thermal insulation performance of these materials are well understood, it is still largely unclear what controls their acoustic performance. Additionally, only a small number of publications to date report on the acoustical properties of fibrous blankets impregnated with powder aerogels. There is a lack of studies that attempt to explain the measured absorption properties with a valid mathematical model. This paper contributes to this knowledge gap through a simulation that predicts the measured complex acoustic reflection coefficient of aerogel blankets with different filling ratios. It is shown that the acoustic performance of a fibrous blanket impregnated with aerogel is generally controlled by the effective pore size and porosity of the composite structure. It is shown that there is a need for refinement of a classical Biot-type model to take into account the sorption and pressure diffusion effects, which become important with the increased filling ratio.

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Stapulionienė, Rūta, Saulius Vaitkus, and Sigitas Vėjelis. "Development and Research of Thermal-Acoustical Insulating Materials Based on Natural Fibres and Polylactide Binder." Materials Science Forum 908 (October 2017): 123–28. http://dx.doi.org/10.4028/www.scientific.net/msf.908.123.

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Recently natural fibres are becoming more and more popular and their significance to the industry is increasing as well. In the last two decades, natural fibres are more widely used in the production of thermal–acoustical insulating materials. It was brought to attention that these fibrous materials have good thermal and acoustical properties in comparison to glass fibres. Also, the product, made from natural fibres, can be recycled for several times, and eventually, easily utilized, when it becomes non- recyclable. Therefore, in order to implement such innovative solutions in environmental and building sectors e.g. to install energetically effective thermal–acoustical insulation materials in building industry, scientific research is required. The object of this research is to produce fibrous composites made from natural fibres (hemp fibres and sheep wool waste) and binder of polylactide fibres, which are made from plant products – corn – by biotechnological method. In current research thermal conductivity and sound absorption coefficient of fibrous composites were determined. The microstructure of fibrous composites were investigated as well. The paper describes the manufacturing possibilities with regard to thermal–acoustical insulating materials based on hemp fibres and sheep wool waste from easily renewable material resources provided by the agriculture.

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Tascan, Mevlut, and Edward A. Vaughn. "Effects of Fiber Denier, Fiber Cross-Sectional Shape and Fabric Density on Acoustical Behavior of Vertically Lapped Nonwoven Fabrics." Journal of Engineered Fibers and Fabrics 3, no. 2 (June 2008): 155892500800300. http://dx.doi.org/10.1177/155892500800300206.

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Acoustical insulation and absorption properties of nonwoven fabrics depend on fiber geometry and fiber arrangement within the fabric structure. The different structures of the fibers result in different total surface areas of nonwoven fabrics. Nonwoven fabrics such as vertically lapped fabrics are ideal materials for use as acoustical insulation products, because they have high total surface. Vertically lapped nonwoven technology consists of carding, perpendicular layering of the carded webs, and through-air bonding using synthetic binder fibers. The surface area of the fabric is directly related to the denier and cross-sectional shape of the fibers in the fabric. Smaller deniers yield more fibers per unit weight of the material, higher total fiber surface area, and greater possibilities for a sound wave to interact with the fibers in the fabric structure. The research in the literature uses two methods for measuring acoustical properties of fabric materials: the impedance tube and reverberation room method. Small test samples are in the impedance tube method and sound absorption coefficient is determined at each frequency. Large reverberation rooms and large test samples are used for the reverberation room method. A direct comparative acoustical properties measurement device that was designed and fabricated at Clemson University School of Materials Science & Engineering was used to measure acoustical insulation in this research. This paper provides a description of the measurement devices and acoustical measurement data for vertically lapped nonwoven fabrics made from three different polyester fiber shape and two denier levels.

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Xiong, Wei. "Measurement of airborne sound insulation of building components by near-field acoustic holography." INTER-NOISE and NOISE-CON Congress and Conference Proceedings 265, no. 7 (February 1, 2023): 44–52. http://dx.doi.org/10.3397/in_2022_0009.

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Taking the architectural acoustic design of a stadium and gymnasium in a sports center as an example, the acoustic parameters of large stadiums under different working conditions were explored. In order to improve the reliability of acoustic design of large stadiums, the acoustical environment of stadiums is simulated and matched with the design standard value by using the sound absorbing materials arranged in limited positions.

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Banka, Navin, and Debasish Chatterjee. "Dual layered light weight fire resistant PU foam-based composite for acoustical insulation." INTER-NOISE and NOISE-CON Congress and Conference Proceedings 266, no. 1 (May 25, 2023): 1081–84. http://dx.doi.org/10.3397/nc_2023_0132.

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In today's automotive industry, sound package design and optimization is important considering the mounting need for weight reduction and achieving targeted sound absorption and sound transmission loss values. The present paper relates to dual layered light weight (LW) fire resistant (FR) Polyurethane (PU) foam-based composite for engine room insulation, referred herein as Ωµ2 foam comprising of two layers of foam having different densities and flexibility. The composite consists of one layer of semirigid FR PU foam acting as a carrier with sound absorptive property and another layer consisting of flexible FR PU foam acting as higher acoustical absorptive property. This concept is intended for enhancement of acoustical performance by the synergistic effect of dual foam layers besides being FR and LW material, specially designed for passenger vehicles' engine compartment insulations such as firewall/dash panel, bonnet/hood liner insulation and other diverse applications in commercial vehicles. The paper presents material properties and in-depth comparative assessment of sound absorption properties of dual layer (Ωµ2) LW FR PU foam with respect to conventional materials like single layer light weight semi-rigid PU foam and resinated cotton shoddy felt, etc.

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JAGNIATINSKIS, Aleksandras, Boris FIKS, Marius MICKAITIS, and Ritoldas ŠUKYS. "Features of sound classification scheme designated to label buildings in Lithuania." JOURNAL OF CIVIL ENGINEERING AND MANAGEMENT 23, no. 3 (March 2, 2017): 409–20. http://dx.doi.org/10.3846/13923730.2016.1269021.

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In Lithuania’s case, the legal requirements for the building acoustic quality since the year 2004 has been expressed through the sound classification scheme (SCS). The relationship of the subjective indoor acoustic comfort with the value of objective sound insulation was considered as a core for the classification scheme. SCS was designed to provide at least one sound class as a request for the newly erected building, other lower classes for reconstructed buildings and higher classes for premises with enhanced acoustic comfort. The adopted scheme contains five sound classes with various steps between them and is based on rating by two different sound insulation descriptors both having the same limit value. A request to protect against noise for newly erected and reconstructed buildings was enforced via the mandatory pre-completion acoustical testing. The database collected during testing allowed for the analysis of about 2000 in situ measurements of sound insulation properties of building partitions. It showed that the possibility of selecting either of the two airborne sound insulation descriptors Dn,T,w or R’w ensures better conformity with subjective comfort perception. This paper also addresses the particularities and advantages of simultaneous application of two different descriptors for regulation of sound insulation performance of dwellings.

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Keefe, Joseph. "Trampolines and insulation and data, Oh My!" Journal of the Acoustical Society of America 155, no. 3_Supplement (March 1, 2024): A92. http://dx.doi.org/10.1121/10.0026921.

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This presentation will discuss sound and vibration data gathered for two separate and unrelated acoustical consultations. The first is a consultation for an adventure park facility (trampolines, arcade games, ball pits, etc.) planned on the upper level of an existing mall; acoustical concerns included vibration from jumping on trampolines and noise from amplified music to adjacent tenant spaces. The second is a comprehensive set of sound level reduction measurements in accordance with ASTM E336 / ASTM E2235, as well as ASTC calculations in accordance with ASTM E413; these results facilitated an investigation of the effect of complete versus partial cavity insulation within partitions.

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Lu, Feng Hua, Xin Xing Wang, and Miao Bo Li. "Acoustical Design and Measurement of 316 Classroom in TYUT." Applied Mechanics and Materials 105-107 (September 2011): 800–803. http://dx.doi.org/10.4028/www.scientific.net/amm.105-107.800.

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This paper involves the acoustical design and measurement of sound quality in the new 316 classroom in TYUT. Based on the “Code for design of sound insulation of civil buildings” GBJ118-2010， this paper deals with the acoustical design of the frequency characteristics of reverberation time in the new 316 classroom in TYUT. Before the acoustical design in new 316 Classroom, the measurement of reverberation time (T20, T30, EDT) with frequency 500-1000Hz in empty room are 3.86-4.72s; After the acoustical design that the perforated wooden sound absorption tablet wall within glass wool sound absorption and the gypsum -slab mineral wool board ceiling are mounted in new 316 Classroom in TYUT, the measurement of reverberation time (T20, T30, EDT) with frequency 500-1000Hz in empty room are 0.72-0.82s.Through the checking of the testing data and the evaluation of the users, the acoustical design of the new 316 classroom in TYUT is in accordance with the requirements of Code for design of sound insulation of civil buildings GBJ118-2010.

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Nowotny, Łukasz, and Jacek Nurzyński. "Empirical study on the sound insulation of wooden lightweight frame floors." MATEC Web of Conferences 282 (2019): 02008. http://dx.doi.org/10.1051/matecconf/201928202008.

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Lightweight frame structures become increasingly popular in housing. They are used in single-, as well as multifamily, residential buildings. Such a tendency is in the line with sustainable development and the need for energy conservation. Lightweight frame partitions provide a certain comfort of life and remain environmentally friendly. However, they are tricky in terms of acoustics. Different factors and technical details influence their sound insulation. The paper presents the analysis of the acoustical effects resulting from different layers used on lightweight frame floors. Airborne, as well as impact sound insulation, have been considered, based on the results of laboratory measurements according to ISO 10140 standard.

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Nováček, Jiří, and Jaroslav Hejl. "Acoustical aspects of replacing traditional materials in building elements with renewable and recycled ones." Acta Polytechnica CTU Proceedings 38 (December 21, 2022): 241–46. http://dx.doi.org/10.14311/app.2022.38.0241.

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Building elements, especially partitions, floors and external walls significantly affect indoor acoustic comfort. Their ability to reduce noise transmission from neighbouring rooms or from outdoors depends on the element composition and the building materials used. In Central Europe, the heavyweight masonry or concrete walls and slabs are typical elements both for family and residential buildings. However, increasing popularity of lightweight multi-layered structures is noticeable. This creates new opportunities for the gradual replacement of traditional materials with renewable and recycled ones, both for load-bearing components and for fillings and other layers of building elements. This paper introduces such design changes in relation to acoustics, particularly airborne sound insulation. The greatest attention is paid to the replacement of masonry and mineral wool insulation with timber and wood fibres. The overview is supplemented by examples of low-energy house external wall and timber wall with recycled infill whose sound insulation has been determined by measurements in the acoustic laboratory.

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Patinha, Sérgio, Fernando Cunha, Raul Fangueiro, Sohel Rana, and Fernando Prego. "Acoustical Behavior of Hybrid Composite Sandwich Panels." Key Engineering Materials 634 (December 2014): 455–64. http://dx.doi.org/10.4028/www.scientific.net/kem.634.455.

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This paper deals with the characterization of acoustic insulation behaviour of hybridsandwich composite panels for application in modular house construction. These sandwich panelsare a sustainable, light-weight and durable solution, since are based on natural fibers structureimpregnated with a thermosetting polymer. In this way, three different types of hybrid compositepanels containing polyurethane core and laminated composite skins were produced and analyzed,varying the composition of laminates. The composite laminates of the prototypes were producedusing a vacuum infusion technique and were composed of glass and jute fibers, impregnated with apolyester resin. The solutions developed were compared with a standard, composed of plasterboardshaving different thicknesses and used for thermal and acoustic insulation. Acoustic insulationcharacterization was performed on specimens with 220x220 mm size in a sound proof acousticchamber. The tested sandwich panels showed promising results; however, their overall performancewas lower as compared to the performance of standard solutions used for comparison. Nevertheless,the specific acoustic insulation performance, i.e. sound reduction per unit mass of material for thedeveloped sandwich panels was significantly higher as compared to the standard materials,indicating better suitability of this innovative solution for light-weight construction and modularhousing.

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Xi, Yong Guang, Tong Jiang Peng, Hai Feng Liu, and Ji Ming Chen. "Preparation and Properties of Expanded Vermiculite/Gypsum Thermal Insulation Boards." Advanced Materials Research 178 (December 2010): 220–25. http://dx.doi.org/10.4028/www.scientific.net/amr.178.220.

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In this paper, thermal insulation boards comprising expanded vermiculite and gypsum were manufactured by casting and compression molding methods respectively. The effects of flake size and preparation methods of expanded vermiculite (EV), ratio of calcined gypsum/EV and molding methods on thermal and mechanical properties were discussed. The results indicated that the thermal conductivity (λ) and compressive strength of the boards decreased with the increase of flake size, and increased as the ratio of calcined gypsum/EV rose, and the density of the boards increased linearly with the increasing ratio. Compared to compression molding, casting technique can make insulating materials with higher thermal conductivity, compressive strength, and lower water content. The boards containing EV expanded by microwave chemical method presented a better thermal insulating property (λ=0.091W•m-1•K-1) relative to the ones filled with microwave exfoliated EV (λ=0.107W•m-1•K-1). The prepared materials can be used for heat, acoustical insulation and moisture adjustment.

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Theocharis, Christoforos, Ernst Kainmüller, Josef Lechleitner, Ulrich Pont, and Ardeshir Mahdavi. "Improving the Impact Sound Insulation of an Existing and Refurbished Wooden Beam Floor Construction." Applied Mechanics and Materials 861 (December 2016): 527–36. http://dx.doi.org/10.4028/www.scientific.net/amm.861.527.

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A common source of dissatisfaction in buildings pertains to acoustical issues. Specifically, in existing buildings, exposure to impact noise represents a frequent problem. In Central Europe generally, and in Vienna (Austria) specifically, there is a significant number of existing buildings with floor constructions involving wooden beams as structural elements. Given the steady rise in inhabitants' expectations regarding buildings' acoustical quality, such existing floor constructions do not sufficiently provide the sufficient impact noise insulation. In many instances, the replacement of these floor constructions with concrete slabs is not an option, given a number of structural, financial, and legal (conservation related) obstacles and constraints. The present contribution thus explores the acoustical improvement potential of floor constructions with wooden beams by using modern materials and techniques. Toward this end, a typical 19th century building in Vienna downtown was selected. Multiple improvement options were realized. These involved the deployment of a honey-comb acoustic system, installation of stiffeners bolted to the original wooden beams, as well as an additional structurally decoupled ceiling layer. The impact sound was measured at different stages of retrofit and compared with the performance of the original construction.

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Vargová, Andrea, and Monika Pavčeková. "Noise Perception in Residential Building Environment." Advanced Materials Research 649 (January 2013): 281–84. http://dx.doi.org/10.4028/www.scientific.net/amr.649.281.

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This article brings up to discussion a particularly topical issue which is the quality of sound insulation in Slovakian dwellings. An analysis of the current acoustical situation in newly built or renovated buildings is shown, as well as the importance of a subjective evaluation of acoustical comfort is highlighted. Nevertheless, it is known that the acoustical comfort is one of the most important factors of a healthy living environment and that the acoustical defects often become subject of argumentation. Concerning the growing acoustical problems in dwellings, we could debate, to what extent the real value of the apartment can be estimated.

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Harrold, R. T. "Acoustical Technology Applications in Electrical Insulation and Dielectrics." IEEE Transactions on Electrical Insulation EI-20, no. 1 (February 1985): 3–19. http://dx.doi.org/10.1109/tei.1985.348751.

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Cox, Eric, and Hayden Jubera. "Investigation of methods to estimate NLR of residential structures for airport sound insulation programs." INTER-NOISE and NOISE-CON Congress and Conference Proceedings 269, no. 2 (July 14, 2024): 775–79. http://dx.doi.org/10.3397/nc_2024_0096.

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This paper investigates methods to estimate outdoor-to-indoor noise level reduction (NLR) for single family residential structures before and after the installation of sound insulation treatments to improve the structure's NLR. Acoustical modeling results and Outdoor-Indoor Transmission Class (OITC) ratings are evaluated in the context of treatment design for airport sound insulation programs and assessment of soundproofing product performance. Overall, post-construction NLR predictions are observed to have a high degree of accuracy when the results are generated using a combination of pre-construction measurement data and acoustical modeling techniques. The composite OITC rating of the noise exposed building façade is also shown to be an effective metric for predicting NLR values.

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Herreman, Kevin. "Modeling Large Diameter Industrial Pipe Insulation Performance." INTER-NOISE and NOISE-CON Congress and Conference Proceedings 263, no. 5 (August 1, 2021): 1555–60. http://dx.doi.org/10.3397/in-2021-1870.

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As previously presented, reducing industrial noise emission utilizing jacketed pipe insulation is critical to reducing noise in industrial spaces. The ISO 15665 standard defines a testing process for measurement of the acoustical performance of installed and jacketed pipe insulation systems. To provide a cost-effective method for evaluating various types of multilayered jacketed pipe insulation a model was developed. The model accurately estimates the performance of single, and multilayered, jacketed pipe insulation. Validating the use of the model to very large pipe diameters is highly desirable as the cost to test is significantly higher than testing the medium or small diameter pipe insulation. The estimated insertion loss result from the model is compared to validation testing results for large diameter jacketed pipe insulation are reported herein.

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Dlhý, Dušan, and Katarína Minarovičová. "Door Bottom Joint Design and its Influence on Sound Transmission of the Door." Advanced Materials Research 899 (February 2014): 487–90. http://dx.doi.org/10.4028/www.scientific.net/amr.899.487.

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The higher the acoustical quality of the door leaf the greater the influence of the bottom gap on the resultant sound insulation of the door. If the design of the door bottom joint and the seal is not correct, any construction of the door leaf in order to increase sound insulation can be ineffective. The greatest influence on sound transmission of the door has the gap with the greatest width a door bottom joint. Modern ways of the sealing of the doorsill gap are able to provide required sound insulation of the door.

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Ivanova, Yonka, Todor Partalin, Luben Lakov, and Bojidar Jivov. "Airborne sound insulation of new composite wall structures." MATEC Web of Conferences 145 (2018): 05013. http://dx.doi.org/10.1051/matecconf/201814505013.

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Protection against noise is one of the essential requirements of the European Construction Product directive. In buildings, airborne sound insulation is used to define the acoustical quality between rooms. In order to develop wall structures with optimal sound insulation, an understanding of the physical origins of sound transmission is necessary. To develop a kind of knowledge that is applicable to the improvement of real walls and room barriers is the motive behind this study. The purpose of the work is to study the sound insulation of new composite wall structure.

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Kundakcioglu, Michael, Adam Doiron, and Jessica Tinianov. "Sound flanking through common low-voltage electrical conduit in multi-family residential buildings." Journal of the Acoustical Society of America 155, no. 3_Supplement (March 1, 2024): A19. http://dx.doi.org/10.1121/10.0026642.

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Sound flanking between suites in multi-family residential buildings is a prevalent issue in architectural acoustics and building construction that can decrease the sound insulation performance of suite-demising partitions, compromising acoustical privacy and comfort for residents. In recent times, a specific deficiency regarding the sealing of common low-voltage electrical conduit routed between residential suites has been increasing in frequency in construction of residential buildings, resulting in otherwise appropriately designed suite demising configurations performing poorly in situ, and in some cases, even failing Ontario Building Code requirements for sound insulation between dwelling spaces during site testing. This article presents test data sampled from multiple residential buildings in Ontario, highlighting the extent of this issue and its implications, along with discussion regarding the proactive prevention and post-construction rectification of this issue.

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Lagtayi, Rachid, Lamya Lairgi, Ahmed Khouya, and Abdelmajid Daya. "A comparative study of thermal and acoustical insulations used for residential buildings." E3S Web of Conferences 297 (2021): 01003. http://dx.doi.org/10.1051/e3sconf/202129701003.

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The aim of this paper is to study the thermal and acoustical insulation of four different buildings’ envelopes mostly used for residential buildings in Tetouan city. The thermal and the acoustical models were investigated during summer season, while a linear nonmonochromatic source of sound has been placed 1m away from the exterior side of each wall and it is emitted a low-frequency sound waves with a velocity of 200 m/s. The study shows that the double layers of hollow clay brick wall with a medium of air gap presents a good thermal resistance and soundproofing compared to the other walls under study, due to the insulation by air gap with a thickness of 0.06m. Moreover, the homogenous and thick walls are simultaneously performant as thermal and sound insulators.

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Nalls, Leisa, Deborah Jue, and Silas Bensing. "Transit-oriented development: A case study of exterior-to-interior noise control for buildings near transit and highway noise sources." Journal of the Acoustical Society of America 155, no. 3_Supplement (March 1, 2024): A130. http://dx.doi.org/10.1121/10.0027053.

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A case study of acoustical design for mixed-used, transit-oriented development is presented. The project is two, six-story mixed-used residential buildings near a rapid transit station and heavily traveled elevated highway in the San Francisco Bay Area. The buildings are metal frame construction over concrete podiums. The California Building Code requires the building shell to be designed to provide interior noise from exterior noise sources not to exceed 45 dBA Ldn. Exterior noise due to trains and buses serving the transit station, and traffic on the elevated highway, required high sound attenuating windows and acoustically rated walls and roofs. Initially, none of the exterior wall assemblies included batt insulation in the stud cavities, only continuous rigid insulation behind the façade. Modeling was done to compare the exterior wall assemblies with and without batt insulation in the stud cavities combined with various window configurations. Estimates of the building shell transmission loss are presented along with a summary of noise control recommendations for building roof, windows, and doors.

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Elkhessaimi, Yassine, Nicolas Tessier-Doyen, and Agnès Smith. "Effects of microstructure on acoustical insulation of gypsum boards." Journal of Building Engineering 14 (November 2017): 24–31. http://dx.doi.org/10.1016/j.jobe.2017.09.011.

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Sugie, Satoshi, and Emi Toyoda. "Field acoustical measurements for sound insulation residences against aircraft noise." INTER-NOISE and NOISE-CON Congress and Conference Proceedings 268, no. 2 (November 30, 2023): 6793–801. http://dx.doi.org/10.3397/in_2023_1013.

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In this paper, we have investigated measurement methods of the sound insulation performance for residences treated with increased sound insulation near airports in Japan. The flyover measurement method and the loudspeaker measurement method are conducted to verify the performance. The first one provides the performance of the whole facades of a house using aircraft noise, approximately similar to the FAA method described in ASTM E966. The pressure level outdoors is measured at enough high position to ignore the interference with sound from the ground or the house roof. However, the microphone is sometimes put on the roof surface because of being in the house's shadow in the overcrowded residential area. Thus, we have investigated the sound pressure level difference between the high and surface positions using simple numerical analysis and field measurement. On the other hand, the outdoor and indoor loudspeaker methods are conducted for facade elements such as windows and doors, according to JIS A 1520. The sound insulation performance for facade walls is also measured with ISO 16283-3; however, the loudspeaker sometimes cannot be positioned far enough from the wall. Thus, we have proposed the measuring method for the facade wall by applying the indoor loudspeaker method.

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Xingguo, Wang, Shu Haisheng, and Zhang Lei. "Vibration and acoustic insulation properties of generalized phononic crystals." European Physical Journal Applied Physics 94, no. 3 (June 2021): 30902. http://dx.doi.org/10.1051/epjap/2021210036.

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Based on the previous studies, the concept of generalized phononic crystals (GPCs) is further introduced into the cylindrical shell structures, and a type of cylindrical shells of generalized phononic crystals (CS-GPCs) is constructed. Subsequently, the structure field and acoustic-structural coupled field of that composite cylindrical shells are examined respectively in this paper. Considering the Bloch theorem is not capable of explaining the generalized periodic situation existing in this structure field, a new analysis method involving transferring matrix eigenvalue based on the mechanical state vector is proposed to calculate the energy band structure. Through observing the energy band structure, an obvious wave band gap is obtained when the elastic wave propagates in the CS-GPCs for modes with different order, whose forming mechanism includes two aspects, i.e., the wave front expansion effect and the Bragg scattering effect. In addition, we further explore the related influences of the longitudinal wave mode and shear wave mode in structure on these band gaps, and some conclusions are illustrated. For acoustic-structural coupled field, the expressions of the acoustic transmission coefficients for different modes are built, and the frequency responses are numerically calculated to verify the band gap characteristics of the CS-GPCs. Furthermore, the acoustic pressure distribution of the internal and external acoustic fields is also analyzed in detail, and the influence laws of the parameters (offset distance and frequency) of the line source on acoustical pressure distribution and its directivity are explored.

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Heidemann, Lucas, Jochen Scheck, and Berndt Zeitler. "Impact Sound Insulation of thermally insulated Balconies." INTER-NOISE and NOISE-CON Congress and Conference Proceedings 265, no. 3 (February 1, 2023): 4929–40. http://dx.doi.org/10.3397/in_2022_0713.

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With the increasing urban densification, balconies are gaining in popularity as they improve the living quality in homes. Thermal insulation between balconies and the building's façade is state of the art. In Germany the most popular balcony construction is a reinforced concrete balcony, separated from the building by a thermal insulation element (TIE), which is meant to reduce the thermal energy loss and thus ensure the sustainability of buildings. The impact sound transmission from balconies, however, is a problem that has not been addressed enough to date. The main goal of the project is to provide acoustic quantities, e.g., an impact sound reduction, for a TIE that can be used to compare the acoustical quality of products and to predict the impact sound pressure levels within the building using the standard EN ISO 12354-2. Experimental and numerical studies have been carried out on various ceiling-balcony mock-ups without and with TIEs e.g., by means of experimental modal analysis and finite element models. This paper will show the effect that various parameters have on the impact sound insulation. Additionally, the measurements on the test set-up will be compared to measurements on building sites.

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Kwon, Youngmin, Changhyun Kim, and Gyung Kim. "BIM-based sound insulation performance evaluation of interior walls." Journal of the Acoustical Society of America 154, no. 4_supplement (October 1, 2023): A86. http://dx.doi.org/10.1121/10.0022887.

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As a general contractor, acoustical design confirmation of a project at construction stage is rather limited especially if it is large-scale. Among others, many interior walls of the building projects are found to be improperly designed in terms of sound insulation in that chances are hardly given for the most projects to be intervened by an acoustic expert at their design stage. In many cases, they turn out to be either underperformed or overperformed. This study developed a tool for holistically evaluating sound insulation design of interior walls across the building areas. It was designed on the basis of BIM modeling to be fast-tracked in supporting either the architects or general contractors for a quick and broad design review. Mapping of the information of room use and wall types with their predicted or measured sound insulation data on to a BIM model is set out to compare to the design criteria according to room use and adjacency. The results are simulated on both 2-D and 3-D BIM models, visually presenting the sound insulation performance. A report is instantly generated on performance qualification with the information of wall types, surface areas, etc. It also suggests alternative wall types as necessary.

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Karaky, Hamzé, Chadi Maalouf, Christophe Bliard, Tala Moussa, Nadim El Wakil, Mohammed Lachi, and Guillaume Polidori. "Hygrothermal and Acoustical Performance of Starch-Beet Pulp Composites for Building Thermal Insulation." Materials 11, no. 9 (September 5, 2018): 1622. http://dx.doi.org/10.3390/ma11091622.

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This article deals with the elaboration and the characterization of an innovative 100% plant-based green composite made solely of beet pulp (BP) and potato starch (S). Using this type of material in insulation applications seems a good solution to reduce the CO2 gas emissions in building. The influence of the starch amount on composite characteristics was studied. Four mixtures were considered with different S/BP mass ratios (0.1, 0.2, 0.3 and 0.4). The physical properties of these materials were studied in terms of porosity, apparent and absolute densities, thermal conductivity, and hygric properties. The influence of humidity content on acoustical properties was studied as a function of frequency. Test results show a real impact of both starch and humidity contents on the hygrothermal and acoustical properties of the studied material due to the porosity. The composite with the lowest amount of starch (S/BP = 0.1) seems to be the optimal composition in terms of the hygrothermal and acoustical behaviors.

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Dong, Wayland, Benjamin M. Shafer, Sunit Girdhar, and John LoVerde. "Effect of stud dimension and material properties on predicted and tested sound insulation." Journal of the Acoustical Society of America 154, no. 4_supplement (October 1, 2023): A84. http://dx.doi.org/10.1121/10.0022879.

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A common wall design is gypsum wall board (GWB) cladding on each side of a row of steel studs, which may or may not include insulation. Steel studs are available in a range of metal thicknesses, dimensions, and structural properties. Most published laboratory testing on these walls uses a small subset of the available stud types, and the acoustical effect of changes to stud parameters has not been completely studied or documented. As a result, theoretical models of stud walls have not been evaluated over the full set of stud parameters. This work is a continuation of previous laboratory testing programs to systematically investigate the acoustical effects of stud properties. This paper analyzes the effects of stud depth and structural properties on third-octave transmission loss values and single-number ratings and investigates the capability of existing models for wall transmission loss to predict performance of walls with an expanded set of stud parameters. Our findings indicate that the parameters currently used to describe stud walls in acoustical test report are not sufficient to characterize the assembly.

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Arvelo, Juan, Ilene Busch‐Vishniac, James West, and Robert Ng. "Model to simulate the acoustical absorption of laminated fiberglass insulation." Journal of the Acoustical Society of America 117, no. 4 (April 2005): 2555. http://dx.doi.org/10.1121/1.4788501.

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Jaish, Sunali, Jonty Mago, Ashutosh Negi, and S. Fatima. "Sound Insulation Performance of Composites Developed using Waste Carbonaceous Materials." INTER-NOISE and NOISE-CON Congress and Conference Proceedings 265, no. 3 (February 1, 2023): 4055–60. http://dx.doi.org/10.3397/in_2022_0578.

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Mitigating vibration in a system has many advantages, from decreasing noise output to increasing component life. Therefore, it is necessary to eliminate the mechanical vibration and sound through appropriate measures. State-of-the-art techniques seeks the utilization of sustainable carbonaceous resources for the development of sound insulating materials to reduce the environmental externalities of the synthetic materials. It is noteworthy to mention that sustainable carbonaceous resources such as biochar, also assist in atmospheric carbon sequestration (capturing and storing CO2) and ultimately limit CO2 concentration in the environment. In the present work, carbonaceous material obtained from biomass waste was utilized as a filler with natural rubber as matrix to develop sound insulating materials. Furthermore, the physical, mechanical, and acoustical properties of developed composites were studied. The sound transmission loss of the composites was measured as per ASTM-E2611 using a four-microphone impedance tube. Noticeably, with the increase in biomass waste filler in the composite, significant improvement in the physical (density), mechanical (tensile strength) and acoustical (sound transmission loss) properties has been observed.

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Lim, Siong Kang, Kar Poh Foo, Foo Wei Lee, Hock Yong Tiong, Yee Ling Lee, Jee Hock Lim, and Yeong Jin King. "Acoustic Properties of Lightweight Foamed Concrete with Eggshell Waste as Partial Cement Replacement Material." Sains Malaysiana 50, no. 2 (February 28, 2021): 537–47. http://dx.doi.org/10.17576/jsm-2021-5002-24.

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Nowadays, almost every industry needs to undergo green and sustainable industrial revolution due to pollutions like waste dumping and noise that deteriorating the environment. Therefore, feasibility study on application of eggshell waste as partial cement replacement in lightweight foamed concrete was conducted by aiming to solve environmental and acoustical issues, i.e. reduce eggshell waste and improve acoustic properties. In this study, compressive strength and acoustic properties of 1300 kg m-3 lightweight foamed concrete with and without 5% eggshell powder as partial cement replacement material were tested. Optimal water to cement ratio of 0.6 was obtained for acoustic properties test by comparing compressive strength result. The result shows that application eggshell powder has generally reduced 7 days compressive strength but improved 28 days compressive strength, and either improve or maintain acoustics properties, in which lightweight foamed concrete that containing eggshell powder has improved noise reduction coefficient at testing ages of 7, 28, and 90 days and improved sound transmission class at testing age of 56 and 90 days. Based on these results, 5% of eggshell powder is feasible to be incorporated into lightweight foamed concrete as partial cement replacement material for sound insulation and strength development purposes.

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Mackenzie, Roderick. "Quantifying the effect of flanking sound transmission on sound insulation and speech privacy metrics." Journal of the Acoustical Society of America 153, no. 3_supplement (March 1, 2023): A277. http://dx.doi.org/10.1121/10.0018834.

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In modern commercial office design, sustainable building codes and quality standards often demand certain levels of sound insulation to ensure sufficient speech privacy or freedom from distraction for the occupants. Missing from the minimum requirements of these documents, however, is guidance on eliminating flanking weaknesses that repeatedly and significantly degrade the experienced speech privacy. This paper presents case studies of common acoustical weaknesses found between closed offices and meeting rooms. Through the use of sound intensity measurements and acoustical imagery, the sound power of each weakness is calculated and shown relative to the sound power of the separating partition. By comparing these results to partitions without these weaknesses, the effective reduction in speech privacy is demonstrated using the ASTC, NIC, and SPC metrics. Weaknesses examined and ranked include, open ceiling plenums, lack of or ineffective door seals, door closure pressure, continuous door frames, façade mullions and transoms, interior windows and their frames, lack of acoustical sealant, uninterrupted gypsum on side walls, common door frames at the edges of partitions, modular and operable walls and their junctions, continuous heating elements, thin continuous floor toppings, and ventilation duct crosstalk.

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Bai, Xiao Tian, and Chang Zheng Chen. "Analysis of the Influence of Vibro-Acoustic Coupling Effect on the Floor Sound Insulation." Advanced Materials Research 971-973 (June 2014): 390–93. http://dx.doi.org/10.4028/www.scientific.net/amr.971-973.390.

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The difference between the theoretical calculation and the actual volume of sound insulation which appears in the actual engineering of water pump system always exceed the standard of noise in the residential areas. It is difficult to meet the requirement even when the quality of the project gets improved. In this paper, ,the acoustical mode is obtained by finite element method and the distribution of noise after coming through the floor is calculated in different frequency based on the theory of sound and vibration coupling effect . The result points out that the neglect of the vibro-acoustic coupling effect is the main reason of imprecise. The solution to the problem is put forward and the direction of the noise reduction measures in the future is pointed out .

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Golden, Matthew, Ethan Bourdeau, Jeffrey Fullerton, Herb Singleton, Karl Peterman, and Andrew Barnard. "Overview of technical certificate program from the Institute of Noise Control Engineering." Journal of the Acoustical Society of America 152, no. 4 (October 2022): A66. http://dx.doi.org/10.1121/10.0015564.

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Standards are often misunderstood by even the most seasoned of acoustic professionals, let alone new technicians and engineers in the field, as they are often very complicated, written in piecemeal fashion by committees and are updated often. Some of the standards even conflict with one another. To help alleviate this problem, the Institute of Noise Control Engineering (INCE) is developing two technical certificate programs designed to educate and evaluate participants on the details of common standards used in the noise control industry. Each program will contain education, testing, and continuing education on ASTM International and Acoustics Society of America (ASA) standards. The first program will cover general acoustical measurements and environmental noise measurements. The second program will cover field testing of building acoustics, including airborne and impact noise insulation as described in ASTM E336, ASTM E1007, and associated standards. The courses are currently being developed with a target launch date of early 2023. Comparisons to similar programs that have been developed in other countries will be included. A business case will be made on how these programs will save noise control engineering firms time and money in training new staff.

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Asakura, Takumi, and Shinichi Sakamoto. "Finite-Difference Time-Domain Analysis of Sound Insulation Performance of Wall Systems." Building Acoustics 16, no. 3 (September 2009): 267–81. http://dx.doi.org/10.1260/135101009789877004.

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A prediction method for the sound insulation of walls by vibro-acoustical numerical analysis using the finite-difference time-domain (FDTD) method is described. In order to accurately predict the sound insulation performance of walls, numerical modeling of the vibration energy loss of walls in the vibration analysis is necessary. In this study, the energy loss at the boundary part of the plates and the internal damping of the plates are modeled and the sound transmission loss of glass plates and plasterboard walls is calculated. A reasonable agreement is found between the calculation and measurement results and the applicability of the numerical analysis is confirmed.

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Mohler, Daniel, and Jeff Fullerton. "Applications of an acoustical camera in laboratory testing." INTER-NOISE and NOISE-CON Congress and Conference Proceedings 269, no. 1 (July 14, 2024): 1325–32. http://dx.doi.org/10.3397/nc_2024_0174.

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Laboratory testing of airborne and impact sound insulation in accordance with ASTM E90 and E492 use conventional microphones for performing the measurements. Our laboratory has utilized an audio visual camera to visually identify areas of the assembly where transmission is maximized. Our experience with the camera allows us to use the visual output of the camera to ensure that the assembly has been properly sealed to avoid the potential concern for unintended flanking and lower than ideal results and ratings. Through this application of the technology, we have found success with optimizing the STC and IIC ratings of the assemblies that are tested.

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Hale, Marlund E. "Critical assessment of thermal/acoustical insulation for pipe and duct noise." Journal of the Acoustical Society of America 118, no. 3 (September 2005): 1870. http://dx.doi.org/10.1121/1.4779164.

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Lertwattanaruk, Pusit, Natt Makul, and Kanokwan Masuwan. "EXPERIMENTAL STUDY OF ACOUSTICAL INSULATION OF CEMENT-BASED BOARD PREPARED WITH WASTE COCONUT COIR AND OIL PALM FIBERS." Journal of Green Building 16, no. 4 (September 1, 2021): 63–80. http://dx.doi.org/10.3992/jgb.16.4.63.

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ABSTRACT Among the major challenges facing the modern era of technological and industrial advancements are pollution and exponentially growing energy consumption. Pollution continues to be a menace affecting different aspects of life such as health, productivity, and comfort. This paper focuses on the elimination or reduction of sound pollution in buildings using cement-based boards made from pretreated coconut coir and oil palm fibers obtained from agricultural residues. The study includes an account of the preparation of fiber cement boards made from Portland cement Type 1, limestone powder, water, sand, and pretreated coconut coir and oil palm fibers at 5, 10, 15, and 20% by weight of powder materials, respectively, and a high-range water reducer in order to make sure that the natural materials would be spread in an even way throughout the specimens. Sound insulation tests were performed as key indicators of the performance of the fiber cement boards. It was found that an increase in the proportion of natural materials resulted in fiber cement boards with decreased density, compressive strength, and flexural strength. Furthermore, in relation to both physical and mechanical performance, the boards incorporating coconut fibers were superior to those incorporating oil palm fibers. With an increased proportion of natural fibers, sound insulation performance tended to improve. The boards prepared with coconut coir and oil palm fibers in this study yielded acceptable physical and mechanical properties and showed promise in relation to providing insulative protection against sound.

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Nguyen, Minh-Ngoc, Phuong-Lam Nguyen, Khac-Ky Nguyen, Viet-Dung Vu, and Van-Hai Trinh. "Development of composite panels based on porous glass aerogels for acoustic applications." E3S Web of Conferences 403 (2023): 03003. http://dx.doi.org/10.1051/e3sconf/202340303003.

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In this work, we present the results of research on manufacturing composite materials based on porous glass beads for acoustic treatment. A new material with fire resistance, heat resistance, impermeability, longevity, and insulation is made from foam glass beads (made from waste glass) and cement mortar. Firstly, the composite concrete panels with a high level of porosity 66%–82% and spherical pores in millimeter scale (i.e., ranging from 0.15mm to 10mm) are fabricated. Then, acoustical measurements are performed to characterize the sound absorbing coefficient and the transport properties of the selected composite panels. The measurement data are compared to the semi-phenomenological Johnson-Champoux-Allard-Lafarge model to show a good agreement in terms of predicting the sound absorption property. From the obtained results it can be stated that the open porosity and the thickness of the fabricated materials affect strongly their sound absorption performance. Within a panel thickness of 33.3mm, the aerogel-based concrete panel can provide a good sound absorption coefficient which could be more than 0.60 in the frequency range of [820 1290]Hz and reach the value of 0.84 at a low resonance frequency of ~1032Hz. The methodology, therefore, enables the identification and validation of acoustical models for specific porous glass aerogel-based materials and paves the way for an efficient exploration of the parameter space for acoustical materials design.

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Journal articles on the topic 'Acoustical insulation'

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