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Gotowe bibliografie tematyczne / Sound insulation

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Gotowa bibliografia na temat „Sound insulation”

Autor: Grafiati

Data publikacji: 4 czerwca 2021

Data aktualizacji: 10 marca 2023

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Artykuły w czasopismach na temat "Sound insulation"

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Lu, Xiao Dong, Jin Hong Wang i Wei Ling Wang. "Windows Sound Insulation Research with Different Glass". Applied Mechanics and Materials 584-586 (lipiec 2014): 1868–71. http://dx.doi.org/10.4028/www.scientific.net/amm.584-586.1868.

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As the weak area of the residence envelope’s, window’s sound insulation is very important in the way of indoor quiet assurance. Base on the road traffic noise as sound sources, the sound insulation comparative studies is made between the insulating laminated glass and double insulated glass. The article choose two similar rooms near the Gaoerji road in Dalian assembled with the different windows, one room’s window was assembled with the insulating laminated glasses, and the other was assembled with double insulated glasses. Research shows that sound insulation effect of the wall with insulating laminated glass is better than the wall with double insulated glass 4dB.

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Geng, Sen Lin, i Fang Ju Li. "Design of the Sound Insulation Chamber for Stored Grain Insect Sound Detection". Applied Mechanics and Materials 220-223 (listopad 2012): 1598–601. http://dx.doi.org/10.4028/www.scientific.net/amm.220-223.1598.

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A six cubic meter sound insulation chamber is designed based on the principle of double-layer wall sound insulating and porous absorption with the characteristics of stored grain insect action sound. With 3 mm thick plywood as wall material, double - layer spacing 0.08 m, the outer wall being bored, each aperture 1mm, average spacing 1.5 cm, and the hard sound-absorbing material being filled in the two layers, a quasi - double layer perforated structure is built. The ambient noise is uniformly insulated between 125Hz and 2000Hz, and the average sound insulation is about 22dB, and it meets requirements of stored grain insect action sound for the spectrum and SPL. The result shows that the sound insulation chamber has the advantages of small size, economy, and good sound insulation effects.

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Sekimoto, Masami. "Sound insulation". Journal of the Acoustical Society of America 85, nr 4 (kwiecień 1989): 1806. http://dx.doi.org/10.1121/1.397943.

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Hopkins, Carl, i Heinrich A. Metzen. "Sound Insulation". Noise Control Engineering Journal 57, nr 6 (2009): 620. http://dx.doi.org/10.3397/1.3292945.

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Ribeiro, Eduardo Silveira, Ronan Adler Tavella, Guilherme Senna dos Santos, Felipe da Silva Figueira i Jorge Alberto Vieira Costa. "Thermal and acoustic insulation boards from microalgae biomass, poly-β-hydroxybutyrate and glass wool". Research, Society and Development 9, nr 4 (21.03.2020): e143942995. http://dx.doi.org/10.33448/rsd-v9i4.2995.

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Among the many functions that a building material needs to have, its insulation functions stand out. This type of materials acts by decreasing the conduction of heat/sound in to the environment. In this context, bio-insulations have been receiving an increasing attention due to its performance and the use of sustainable/naturals insulation materials. This study was conducted to evaluate the thermal and acoustic performance of bio-based boards made from the biomass of Spirulina, bacterial poly-β-hydroxybutyrate (PHB), and glass wool. The boards were manufactured under heated compression in different proportions: 33.33% glass wool, 33.33% PHB, and 33.33% Spirulina biomass (Board A); 20% glass wool, 40% PHB, and 40% Spirulina (Board B); 40% glass wool, 40% PHB, and 20% Spirulina (Board C); and 40% glass wool, 20% PHB, and 40% Spirulina (Board D). Boards A and B showed lower thermal conductivity (0.09 W m-1 K-1) compared to traditional insulating materials, such as gypsum neat (0.44 W m-1 K-1) and Kaolin insulating firebrick (0.08–0.19 W m-1 K-1). Board D showed the highest sound absorption coefficient of ~1600 Hz compared to other bio-based insulators at the same frequency, such as polypropylene based non-woven fiber and tea-leaf-fiber with the same thickness. For the noise reduction coefficient, board B showed better results than concrete. Thus, boards A and B are suitable as thermal insulators, while boards B and D are suitable as sound insulators. For simultaneous application as a thermal and sound insulator, board B is the best choice among all boards.

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Mizukoshi, Fumiya, i Hidetoshi Takahashi. "Acoustic notch filtering earmuff utilizing Helmholtz resonator arrays". PLOS ONE 16, nr 10 (19.10.2021): e0258842. http://dx.doi.org/10.1371/journal.pone.0258842.

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In recent years, noisy bustling environments have created situations in which earmuffs must soundproof only specific noise while transmitting significant sounds, such as voices, for work safety and efficiency. Two sound insulation technologies have been utilized: passive noise control (PNC) and active noise control (ANC). However, PNC is incapable of insulating selective frequencies of noise, and ANC is limited to low-frequency sounds. Thus, it has been difficult for traditional earmuffs to cancel out only high-frequency noise that people feel uncomfortable hearing. Here, we propose an acoustic notch filtering earmuff utilizing Helmholtz resonator (HR) arrays that provides a sound attenuation effect around the tuneable resonant frequency. A sheet-like sound insulating plate comprising HR arrays is realized in a honeycomb structure. Since the resonant frequency is determined by the geometry of the HR arrays, a highly audible sound region can be designed as the target frequency. In this research, the acoustic notch filtering performance of the proposed HR array plate is investigated in both simulations and experiments. Furthermore, the fabricated earmuffs using the novel HR array plates achieve a sound insulation performance exceeding 40 dB at the target frequency, which is sufficiently high compared to that of conventional earmuffs. The experimental results confirm that the proposed device is a useful approach for insulating frequency-selective sound.

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Fothergill, L. C., i T. Carman. "Insulation — impact sound". Batiment International, Building Research and Practice 18, nr 4 (lipiec 1990): 245–49. http://dx.doi.org/10.1080/01823329008727048.

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Albin, Donald C. "Sound insulation system". Journal of the Acoustical Society of America 120, nr 3 (2006): 1169. http://dx.doi.org/10.1121/1.2355970.

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Bliūdžius, Raimondas, Kęstutis Miškinis, Vincent Buhagiar i Karolis Banionis. "Sound Insulation of Façade Element with Triple IGU". Buildings 12, nr 8 (14.08.2022): 1239. http://dx.doi.org/10.3390/buildings12081239.

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Sound insulation design for structural glazed façade is an important task in environmental noise control, as increased continuously repeated noise is a significant factor impacting on people’s well-being and is associated with a negative impact on their health. For façades, in addition to sound insulation, requirements for safe use and high energy efficiency are also usually raised, which partly determine the composition of the glazing: triple insulating glass unit (IGU) with inner safety laminated glass sheet. Therefore, the aim of the research was to investigate the structural sealed façade structure with triple IGU and to determine the effect of the thickness of ordinary and laminated glasses, their position in the IGU, the thickness of the gas cavities, and the mass of the structural frame on the sound insulation level of structural glazing. Experimental measurements of the sound insulation index of the investigated façade elements with IGU of various constructions were performed in an acoustic reverberation chamber according to standard procedures. The result of the study indicated that the use of the second laminated glass in a triple IGU is inefficient, the highest sound insulation indicators are achieved by increasing the thicknesses of the external glass sheet and the gas cavity; increasing the mass of the frame also has only little effect on the sound insulation of the structural glazing.

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Nakagawa, Kiyoshi. "Sound Insulation Performance of Building Structures and Materials for Sound Insulation". Seikei-Kakou 26, nr 2 (20.01.2014): 65–69. http://dx.doi.org/10.4325/seikeikakou.26.65.

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Rozprawy doktorskie na temat "Sound insulation"

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Kernen, Ulrica. "Airborne sound insulation of floating floors". Licentiate thesis, KTH, Byggnader och installationer, 2000. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-1036.

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Cambridge, Jason Esan. "The Sound Insulation of Cavity Walls". Thesis, University of Canterbury. Mechanical Engineering, 2012. http://hdl.handle.net/10092/7332.

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Lightweight building materials are now commonly employed in many countries in preference to heavyweight materials. This has lead to extensive research into the sound transmission loss of double leaf wall systems. These studies have shown that the wall cavity and sound absorption material placed within the cavity play a crucial role in the sound transmission through these systems. However, the influence of the wall cavity on the sound transmission loss is not fully understood. The purpose of this research is to obtain a comprehensive understanding of the role played by the wall cavity and any associated sound absorption material on the sound transmission loss through double leaf wall systems. The research was justified by the fact that some of the existing prediction models do not agree with some observed experimental trends. Gösele’s theory is expanded and used in the creation of an infinite and finite vibrating strip model in order to acquire the desired understanding. The sound transmission loss, radiated sound pressure and directivity of double leaf systems composed of gypsum boards and glass have been calculated using the developed model. A method for calculating the forced radiation efficiency has also been proposed. Predictions are compared to well established theories and to reported experimental results. This work also provides a physical explanation for the under-prediction of the sound transmission loss in London’s model; explains why Sharp’s model corresponds to Davy’s with a limiting angle of 61° and gives an explanation for Rindel’s directivity and sound transmission loss measurements through double glazed windows. The investigation also revealed that a wide variety of conclusions were obtained by different researchers concerning the role of the cavity and the properties of any associated sound absorption material on the sound transmission loss through double wall systems. Consequently recommendations about the ways in which sound transmission through cavity systems can be improved should always be qualified with regard to the specific frequency range of interest, type of sound absorption material, wall panel and stud characteristics.

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Maluski, Sophie. "Low frequencies sound insulation in dwellings". Thesis, Sheffield Hallam University, 1999. http://shura.shu.ac.uk/3136/.

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Low frequency noise transmission between dwellings is an increasing problem due to home entertainment systems with enhanced bass responses. The problem is exacerbated since there are not presently available methods of measurement, rating and prediction appropriate for low frequency sound in rooms. A review of the classical theory of sound insulation and room acoustics has shown that both theories are not applicable. In fact, the sound insulation of party walls at low frequencies is strongly dependent on the modal characteristics of the sound fields of the two separated rooms, and of the party wall. Therefore methods originally developed for measurement conditions where the sound field was considered diffuse, may not be appropriate for room configurations with volumes smaller than 50m3 and for frequencies where sound wavelengths are large. An alternative approach is proposed using a Finite Element Method (FEM) to study the sound transmission between rooms. Its reliability depends on the definition of the model, which requires validating measurement. FEM therefore does not replace field or laboratory measurements, but provides complementary parametric surveys not easily obtainable by measurements. The method involves modelling the acoustic field of the two rooms as an Acoustic Finite Element model and the displacement field of the party wall as a Structural Finite Element model. The number of elements for each model was selected by comparing the numerical eigenfrequencies with theoretical values within an acceptable processing time and error. The simulation of a single room and of two coupled rooms, defined by linking the acoustic model with the structural model, were validated by comparing the predicted frequency response with measured response of a 1:4 scale model. The effect of three types of party wall edge condition on sound insulation was investigated: simply supported, clamped, and a combination of clamped and simply supported. It is shown that the frequency trends still can be explained in terms of the classical mechanisms. A thin masonry wall is likely to be mass controlled above 50Hz. A thick wall is stiffness controlled, below 100Hz. A clamped thin wall provides a lower sound insulation than a simply supported, whereas a clamped masonry wall provides greater sound level difference at low frequencies than a simply supported. The sound insulation of masonry walls are shown to be strongly dependent on the acoustical modal characteristics of the connected rooms and of the structural modal characteristics of the party wall. The sound pressure level difference displays a sequence of alternating maxima and minima about a trend, dictated by the properties of the party wall. The sound insulation is lower in equal room than in unequal rooms, whatever the edge conditions and smaller wall areas provide higher sound insulation than large areas. A correction factor is proposed as a function of room configuration and wall area and edge conditions. Attempts to quantify the factor were made using statistical and deterministic analyse, but further work is required.

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Sullivan, Rory Daniel. "Sound insulation of brick diaphragm walls". Thesis, University of Liverpool, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.318231.

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Toyoda, Masahiro. "Sound insulation strategies for building constructions". 京都大学 (Kyoto University), 2006. http://hdl.handle.net/2433/143996.

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Kyoto University (京都大学)
0048
新制・課程博士
博士(工学)
甲第12306号
工博第2635号
新制||工||1372(附属図書館)
24142
UT51-2006-J298
京都大学大学院工学研究科都市環境工学専攻
(主査)教授髙橋大弐, 教授鉾井修一, 助教授伊勢史郎
学位規則第4条第1項該当

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Öqvist, Rikard. "Variations in sound insulation in lightweight timber constructions". Licentiate thesis, Luleå tekniska universitet, Drift, underhåll och akustik, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-26446.

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This licentiate thesis deals with the topic of variations and uncertainties in building acoustic parameters for lightweight timber constructions. A higher safety margin to the legal requirements is needed to compensate for acoustical uncertainties, which leads to higher costs. Building costs can be reduced if the variations can be identified and controlled. The project was limited to industrially prefabricated timber frame based volumes and massive timber based plate elements. This thesis is based on the work reported in three papers (A, B and C). In paper A, the variations in impact and airborne sound insulation were assessed and quantified in 30 nominally identical volume built apartments in a four-storey building. Large variations were found and the underlying causes were investigated. A statistically significant difference between floor numbers was found as the highest floor achieved better sound insulation. This difference was assumed to be caused by the higher static load on lower floors affecting the elastic layer used to structurally connect the apartments. In paper B, three room volumes were followed and measured at different stages of completion throughout the construction process. The objective was to test if acoustical deviations in the field can be identified at earlier construction stages. An ISO tapping machine was used to excite the floors and the response was measured at 20 positions. The airborne and impact sound insulation were measured in the finished building. Deviations were found, but these could not be traced to earlier stages of completion. In Paper C, the variations in sound insulation of a cross-laminated timber (CLT) building system was investigated. The construction was based on prefabricated wall and floor plate elements which were mounted at the building site. A number of acoustical uncertainties related to the measurement procedure were also investigated. The measurement uncertainty was small in comparison to the total variations. The degree of prefabrication for the CLT system was lower compared to the volume system, which indicated a greater scope for poor workmanship. All papers indicate a higher sound insulation on the upper floors in a building. It is therefore important to carefully design the elastic layer between floor numbers. The measurement uncertainty has been continuously considered in this thesis. In order to properly identify and quantify variations, the measurement uncertainty should be minimised. Advantages and drawbacks with different measurement methods and directions for future research are discussed in the concluding chapters.
Godkänd; 2010; 20101110 (ricokv); LICENTIATSEMINARIUM Ämnesområde: Teknisk akustik/Engineering Acoustics Examinator: Professor Anders Ågren, Luleå tekniska universitet Diskutant: Teknologie doktor Christian Simmons, Simmons akustik & utveckling AB, Göteborg Tid: Torsdag den 16 december 2010 kl 13.00 Plats: F719 Taylor, Luleå tekniska universitet

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Forsman, Jimmy. "Game engine based auralization of airborne sound insulation". Thesis, Umeå universitet, Institutionen för fysik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-149498.

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Describing planned acoustic design by single number ratings yields a weak link to the subjective event, especially when the single number ratings are interpreted by others than experienced acousticians. When developing infrastructure, tools for decision making needs to address visual and aural perception. Visual perception can be addressed using game engines and this has enabled the establishment of tools for visualizations of planned constructions in virtual reality. Audio engines accounting for sound propagation in the game engine environment are steadily developing and have recently been made available. The aim of this project is to simulate airborne sound insulation by extending the support of recently developed audio engines directed towards virtual reality applications. The case studied was airborne sound insulation between two adjacent rooms in a building, the sound transmitted to the receiving room through the building structure resulting from sound pressure exciting the structural elements in the adjacent source room into vibration. The receiving room composed modelled space in the game engine Unreal Engine and Steam Audio was the considered audio engine. Sound transmission was modelled by filtering based on calculations of transmission loss via direct and flanking paths using the model included in the standard EN 12354-1. It was verified that the filtering technique for modelling sound transmission reproduced attenuations in correspondence with the predicted transmission loss. Methodology was established to quantify the quality of the audio engine room acoustics simulations. A room acoustics simulation was evaluated by comparing the reverberation time derived from simulation with theoretical predictions and the simulated reverberation time showed fair agreement with Eyring’s formula above its frequency threshold. The quality of the simulation of airborne sound insulation was evaluated relating the sound field in simulation to insulation classification by the standardized level difference. The spectrum of the simulated standardized level difference was compared with the corresponding sound transmission calculation for a modelled scenario. The simulated data displayed noticeable deviations from the transmission calculation, caused by the audio engine room acoustics simulation. However, the simulated data exhibited cancellation of favourable and unfavourable deviations from the transmission calculation resulting in a mean difference across the spectrum below the just noticeable difference of about 1 dB. Single number ratings was compared and the simulated single number rating was within the standard deviation of how the transmission model calculates predictions for a corresponding practical scenario measured in situ. Thus, the simulated data shows potential and comparisons between simulated data, established room acoustics simulation software and in situ measurements should further be made to deduce whether the deviations entails defects in the airborne sound insulation prediction or is an error imposed by the audio engine room acoustics simulation.

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Kernen, Ulrica. "Airborne sound insulation of single and double plate constructions". Doctoral thesis, Stockholm, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-182.

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Shi, Wanqing. "Assessing and modelling impact sound insulation of wooden joist constructions". Licentiate thesis, Luleå tekniska universitet, 1995. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-26012.

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Impact sound insulation is one of the most important aspects when assessing sound insulation of floor constructions in buildings. For assessing the impact sound insulation of aconstruction, a standard tapping machine is used as a sound source. However, the use of the current standard tapping machine has been criticised, especially with regard to measurement of wooden joist floors since the noise spectrum generated by a tapping machine differs from the spectrum generated by actual footfall. There are insufficient low frequency components in the noise spectrum produced by the tapping machine and it does not, therefore, accurately reflect low frequency noise from the construction.Reduce impact sound level from wooden joist floors are the main object of our study. It is important to be able to predict the sound insulation properties of wooden joist constructions at the design stage. To reduce the noise level in the receiving room, the input power transmitted through the construction must be estimated where the appropriate sound- and vibration-insulation can be designed.This study has investigated the waveform and frequency spectra of human footfall (walking, rum- ingand jumping); of the dropping of sand balls, sand bags and tires; and of the standard tapping machine. The impact sound power radiation from a wooden joist construction while applying different impact sources, such as actual footfall and the standard tapping machine, have also been studied.Research was also carried out regarding the development of a practical impact sound insulation calculation method for wooden joist floor constructions. The characteristics with regard to mechanical properties of floor construction was calculated using the impedance method. The impact sound level inside the sound receiving room was determined. The method developed can predict the basic performance of the wooden floor structure when excited by impact sounds.
Godkänd; 1995; 20070108 (biem)

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Mu, Rui Lin. "Improvement of Sound Insulation Performance of Multi-layer Structures in Buildings". 京都大学 (Kyoto University), 2013. http://hdl.handle.net/2433/174914.

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Książki na temat "Sound insulation"

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Folker, Frank, i Fraunhofer-Gesellschaft. Informationszentrum Raum und Bau., red. Airborne sound insulation. Stuttgart: IRB Verlag, 1989.

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Parmanen, Juhani. Sound insulation of multi-storey houses: Summary of impact sound insulation. Espoo, Finland: VTT, Technical Research Centre of Finland, 1999.

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Rindel, Jens Holger. Sound Insulation in Buildings. Boca Raton : CRC Press, [2018]: CRC Press, 2017. http://dx.doi.org/10.1201/9781351228206.

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ResearchEstablishment, Building, red. Sound insulation: Basic principles. Watford: Building Research Establishment, 1988.

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Payne, Michael K., Rita A. Smith, Deborah Murphy Lagos, Jack Freytag, Mark Culverson, Jean Lesicka, James Leana, Robert R. Smith, A. Vernon Woodworth i Robert Valerio. Guidelines for Airport Sound Insulation Programs. Washington, D.C.: Transportation Research Board, 2013. http://dx.doi.org/10.17226/22519.

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Establishment, Building Research, red. Improving sound insulation in your home. Watford: Building Research Establishment, 1985.

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Payne, Michael K. Guidelines for airport sound insulation programs. Washington, D.C: Transportation Research Board, 2013.

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Acoustics and sound insulation: Principles, planning, examples. Basel: Birkhäuser/Edition Detail, 2009.

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Establishment, Building Research, red. Sound insulation of separating walls and floors. Watford: Building Research Establishment, 1988.

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Mommertz, Eckard. Acoustics and sound insulation: Principles, planning, examples. Basel: Birkhäuser/Edition Detail, 2009.

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Części książek na temat "Sound insulation"

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Rindel, Jens Holger. "Impact sound insulation". W Sound Insulation in Buildings, 275–312. Boca Raton : CRC Press, [2018]: CRC Press, 2017. http://dx.doi.org/10.1201/9781351228206-11.

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Rindel, Jens Holger. "Introduction to sound insulation". W Sound Insulation in Buildings, 101–54. Boca Raton : CRC Press, [2018]: CRC Press, 2017. http://dx.doi.org/10.1201/9781351228206-6.

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Gösele, K., i E. Schröder. "Sound Insulation in Buildings". W Handbook of Engineering Acoustics, 137–64. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-540-69460-1_7.

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McMullan, Randall. "Noise and Sound Insulation". W Environmental Science in Building, 182–215. London: Macmillan Education UK, 2017. http://dx.doi.org/10.1057/978-1-137-60545-0_9.

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Sejdinović, Berina. "Modern Thermal Insulation and Sound Insulation Materials". W Advanced Technologies, Systems, and Applications VII, 218–33. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-17697-5_19.

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Rindel, Jens Holger. "Sound radiation from plates". W Sound Insulation in Buildings, 155–88. Boca Raton : CRC Press, [2018]: CRC Press, 2017. http://dx.doi.org/10.1201/9781351228206-7.

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Rindel, Jens Holger. "Introduction". W Sound Insulation in Buildings, xxi—xxv. Boca Raton : CRC Press, [2018]: CRC Press, 2017. http://dx.doi.org/10.1201/9781351228206-1.

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Rindel, Jens Holger. "Airborne sound transmission through double constructions". W Sound Insulation in Buildings, 247–74. Boca Raton : CRC Press, [2018]: CRC Press, 2017. http://dx.doi.org/10.1201/9781351228206-10.

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Rindel, Jens Holger. "Flanking transmission". W Sound Insulation in Buildings, 313–34. Boca Raton : CRC Press, [2018]: CRC Press, 2017. http://dx.doi.org/10.1201/9781351228206-12.

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Rindel, Jens Holger. "Measurement methods". W Sound Insulation in Buildings, 335–62. Boca Raton : CRC Press, [2018]: CRC Press, 2017. http://dx.doi.org/10.1201/9781351228206-13.

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Streszczenia konferencji na temat "Sound insulation"

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Simion, Sorin, Angelica Nicoleta Gaman, Alexandru Simion i Romeo Hriscan. "NOISE LEVEL REDUCTION BY USING SOUND INSULATION / SOUND ABSORBENT MATERIALS". W 22nd SGEM International Multidisciplinary Scientific GeoConference 2022. STEF92 Technology, 2022. http://dx.doi.org/10.5593/sgem2022/4.1/s19.44.

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A known and often used method of insulation is represented by soundproof sponge, having the role of sound absorption and improvement of acoustics. The insulating sponge is used in recording studios, Radio TV studios, music rehearsal rooms, for upholstering acoustic enclosures having the role of acoustic correction. The aim of the study is to improve acoustic characteristics of a room that was originally used as an office and is now used as a music rehearsal room and recording studio, making determinations of noise level during the acoustic set-up of the room. Soundabsorbing materials were used to improve acoustic characteristics of the room, to reduce echo and reverberations and sound-insulating materials to reduce noise penetrating from inside to outside of the room. Determinations performed compare the �efficiency� of traditional materials (polystyrene, mineral wool, etc.) and dedicated materials (soundproofing panels, sound-absorbing sponge, formwork sponge, etc.) used for improving acoustic characteristics of a room. In this sense, sound insulation measures had to be corroborated with the fact that in the vicinity of the music rehearsal room there are offices where the activity is predominantly administrative (IT offices, accounting offices, customer service offices etc.), situation in which the maximum limit allowed by national legislation is 60 dB (GD 493/2006, annex 1).

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Avtua Kraveishvili, A. "LOW FREQUENCY SOUND INSULATION". W ACOUSTICS 2021. Institute of Acoustics, 2021. http://dx.doi.org/10.25144/13758.

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Wittstock, Volker. "Sound Power and Sound Insulation at Low Frequencies". W 2018 Joint Conference - Acoustics. IEEE, 2018. http://dx.doi.org/10.1109/acoustics.2018.8502395.

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Yicheng, Zhang, Bian Pengfei i Zhang Kai. "An Insulation Structure With Noise Reduction Function". W 2022 29th International Conference on Nuclear Engineering. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/icone29-93144.

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Abstract The sound insulation performance of nuclear power related equipment and pipelines is of great practical significance for the safe operation of nuclear power equipment. At the same time, the surface of the equipment is often covered with an insulating layer to maintain the temperature of the nuclear power equipment. If the thermal insulation material can play the role of vibration isolation and noise reduction, it will undoubtedly have a positive effect on the vibration and noise control of nuclear power equipment. Aiming at the insulation layer structure using glass wool as insulation material, this paper studies the acoustic performance of the pipeline after installing the insulation layer by means of experiments and theoretical calculations. This paper verifies that the thermal insulation layer structure can effectively improve the insertion loss and sound transmission loss of the structure while meeting the requirements of the thermal insulation layer. At the same time, this paper conducts a parametric analysis study to study the effect of different structural variables on the sound insulation performance of the thermal insulation layer. The results show that the increase in the bulk density of glass wool, the increase in the thickness of the metal coat, and the additional damping layer all increase the insertion loss of the structure.

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Khrystoslavenko, Olga, i Raimondas Grubliauskas. "Theoretical End Experimental Evaluation of Perforations Effect on Sound Insulation". W Environmental Engineering. VGTU Technika, 2017. http://dx.doi.org/10.3846/enviro.2017.027.

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To design a sound-absorbing panel, it is important to identify factors that affect the maximum sound absorption of low, middle and high frequency sounds. Perforation effect is very important for the noise-reducing and noiseabsorbing panels. Perforations are often used for sound reduction. Experimental data shows that the perforation is very effective to absorb low-frequency noise. In the presented study, influence of perforation coefficient of noise reduction was analyzed with theoretical and experimental methods. The experiments were conducted in noise reduction chamber using an perforated construction with glass wool filler. Sound reductions index of 15 dB indicates good acoustic properties of the panel.

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Abe, Aya, Haruki Yashiro i Ichiro Hagiwara. "Theoretical Study of Sound Insulation Simulations (About Attaching Effect of Sound Absorbing Material and Consideration of Sound Insulation Performance by Height of Origami Core)". W ASME 2021 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2021. http://dx.doi.org/10.1115/detc2021-68851.

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Abstract We have developed a new truss core panel by origami forming to get the higher aspect ratio than that by multi-stage press molding. Our object is to apply the new origami truss core to the train floor. Whether or not this goal can be achieved depends on whether this new origami truss core with a high aspect ratio has excellent sound insulation characteristics. Therefore, as a development of the analysis technology by FEM which accurately estimates the sound insulation characteristics, at first, the relation between the aspect ratio and the sound insulation performance is discussed in the flat plate with one core. So far, sound insulation simulations using FEM did not match with theory of the mass law. However, this can be achieved by setting the end of the transmitted side to be a nonreflective boundary. In this paper, to generalize this method, it is determined theoretically that the sound pressures from the FEM can be separated accurately into the sound pressures of the forward and backward waves from Helmholtz’s equation. Then, the sound insulation characteristics of a flat plate obtained using the proposed theoretical method and the conventional method are compared while assuming that the flat plate is a rigid body. In addition, the validity of the proposed method is confirmed by evaluating the effect of attaching a sound absorbing material to the plate. Furthermore, application of the proposed method to a flat plate with a truss core and an examination of whether a high aspect ratio is advantageous for sound insulation are also presented.

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Bushmanov, Aleksandr, i A. Tolkachev. "MODELING OF SOUND INSULATION OF A ROOM". W XIV International Scientific Conference "System Analysis in Medicine". Far Eastern Scientific Center of Physiology and Pathology of Respiration, 2020. http://dx.doi.org/10.12737/conferencearticle_5fe01d9b88cf17.17389677.

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A model for calculating the sound insulation of a room for confidential negotiations is proposed. Two sources of sound are considered, a conversation between two people. It simulates the passage of sound through sound-absorbing structures such as doors, Windows, walls, and air vents. The simulation is performed using the COMSOL Multiphysics package.

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Kitowski, Zach, Andrew Marsh i Roy Graves. "The Feasibility of Noise Insulating Materials With Variability of Frequencies and Amplitudes". W ASME 2019 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/imece2019-11024.

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Abstract The objective of this experimental investigation was to determine the effectiveness of different thermal insulating materials noise reduction properties when exposed to acoustic signals of varying frequencies and amplitudes. The experimental system incorporated two boxes separated by a thermal insulation wall. A speaker was used in one box with varied sound amplitude and frequency to test how effective the insulating material was at reducing sound transmission through a wall. The sound level was measured with a microphone in each box and the values were used to calculate the Sound Transmission Loss (STL) for each trial. Fiberglass insulation and cork insulation were the two insulation materials tested. The frequency levels of500 Hz, 1000 Hz, and 2000 Hz were tested. A three factor ANOVA analysis was completed and the null hypothesis was rejected with 95% confidence for each of the three factors. A Tukey test was conducted to determine which factor, if any, had a significant impact on the STL value. The Tukey test determined that frequency had the most significant impact on the STL value followed by the material choice with the average difference of means for comparison groups being 17.92 dB and 7.74 dB, respectively. The Tukey test also determined sound level did not have a significant impact on the STL value. The fiberglass insulation tested had the highest STL value of the two materials tested, with a maximum STL of 49.5 dB at 2000 Hz while the minimum STL was 26.2 dB at 500 Hz. The cork insulation had a maximum STL of 44.4 dB at 2000 Hz and a minimum STL of 10.5 dB of 500 Hz. At 1000 Hz however, the cork insulation had a higher STL than the fiberglass insulation with 32.6 dB and 31.6 dB respectively. This discrepancy might be due to a specific property of the cork dictating how it interacted within a specific frequency range. The test had an overall uncertainty of ±1.34 STL which was much smaller than the difference between sample groups. The ANOVA analysis also showed a strong interaction between the insulating material and the frequency as it had a much greater F-value of 869.56 as compared with the F-critical value of 2.42.

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Huang, Xianfeng, i Yimin Lu. "Inverse Sound Insulation Prediction to Double-Leaf Walls". W 2010 International Conference on Intelligent System Design and Engineering Application (ISDEA). IEEE, 2010. http://dx.doi.org/10.1109/isdea.2010.327.

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Dance, Stephen, i Paul Herwin. "Straw bale sound insulation: Blowing away the chaff". W ICA 2013 Montreal. ASA, 2013. http://dx.doi.org/10.1121/1.4798962.

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Raporty organizacyjne na temat "Sound insulation"

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Birchmore, Roger. Medium-density Dwellings in Auckland and the Building Regulations. Unitec ePress, lipiec 2018. http://dx.doi.org/10.34074/ocds.0822.

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National thermal standards have historically been set to minimise winter heating energy in detached houses. It is uncertain whether these standards are optimal for the increasing number of joined, medium-density dwellings when summer and winter conditions are considered. Using freely available software, annual heating energy use and summertime peak temperatures were calculated for a number of versions of detached and joined dwellings offering the same occupied volume and window areas. Initial results indicated that, as expected, the joined dwellings required less heating energy. The detached house exhibited a higher peak summertime temperature but a lower overall average daily temperature. Interventions such as changing insulation, glazing areas and ventilation were calculated to reduce summertime temperatures in the joined dwelling. Increasing ventilation provided the greatest improvement particularly during the sensitive sleeping hours. Changes to clauses H1 Energy Efficiency, G4 ventilation and G6 Airborne and Impact Sound are recommended if these early findings are confirmed in a more complex simulation.

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