Comparison of measured and predicted sound insulation for a thermal retrofitted building

Guigou‐Carter, Catherine; Foret, Rémy; Wetta, Roland; Ducruet, Pascal; Villot, Michel

doi:10.3397/1.3565022

Cited by 8 publications

(5 citation statements)

References 2 publications

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“…To take the actual noise environment into account, some studies directly measure the acoustic performance of a façade on-site to make the results more reliable. 53–62 For example, field measurements have been carried out to investigate the façade sound insulation ability of balcony windows. 53 The measurements were taken with the guidance in ISO 140-5 and the Single Number Quantities (SNQ) was analyzed accordingly.…”

Section: Studies On Sound Insulation Of Building Façadementioning

confidence: 99%

A critical review of acoustic modeling and research on building façade

Zayed

2021

Building Acoustics

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Noise pollution has been impacting negatively on living comfort and working environment for a long time. Acoustic treatment on building façade is one of the effective means to tackle this issue. Numerous articles were published over the past decades to address the acoustic related problems of building façade. However, a systematic review of the research development on façade acoustic technology is lacking. Therefore, this paper examines the published research articles from seven selected journals, in terms of the annual number of articles, citation counts, co-authorships, research locations, and keywords. The analyses show that interest in façade acoustics increased during the last two decades. Researchers from Europe and areas with a high density of tall buildings made significant contributions to this development. Based on keyword analysis, articles are categorized into three groups. These include sound insulation studies, studies on the effect of façade on street noise, and noise reduction techniques. The surveyed research topics comprise numerical modeling, experimental studies, ISO standard development, and analyses on annoyance level. Potential future directions are presented based on a summary of the limitations of the existing research. This paper offers researchers and engineers an in-depth understanding of the state-of-the-art of the current façade acoustic research. Additionally, potential future directions are identified based on the findings and limitations of the previous studies.

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Section: Studies On Sound Insulation Of Building Façadementioning

confidence: 99%

A critical review of acoustic modeling and research on building façade

Zayed

2021

Building Acoustics

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“…Improving the cladding of a building can reduce the quantity of energy consumed during the operational phase [1], and examples of thermal insulation lining systems in retrofit [2][3][4][5][6] and construction [7][8][9][10][11] can be found worldwide; particularly where climates reach sub-zero temperatures. However, the thermal retrofit of buildings may result in an acoustic disadvantage, for example, when a resonance frequency falls within the building acoustics range (50 Hz-5000 Hz).…”

Section: Introductionmentioning

confidence: 99%

“…However, the thermal retrofit of buildings may result in an acoustic disadvantage, for example, when a resonance frequency falls within the building acoustics range (50 Hz-5000 Hz). It would instead be preferable that the retrofit is deemed an opportunity to improve the acoustic properties of the building [12], termed the "free dB concept" [2]. However, the lack of standardised tools to assess the acoustic impact of a layer across the building acoustics frequency range does not align with the market incentive for building specialists to develop acoustically optimised linings.…”

Section: Introductionmentioning

confidence: 99%

Whose game? Gender and power in fantasy sports

Hernández-Pérez

2022

Journal of Gender Studies

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Retrofit and design of thermal cladding systems provide an opportunity to improve the acoustic properties of a building. However, the complexity of the calculation process to predict sound insulation improvement may inhibit rather than encourage novelty and innovation. This paper investigates whether it is realistic to calculate the frequency dependant sound insulation improvement due to modern thermal insulation wall lining systems with just a few input parameters. The calculation procedure is tested using measured results for one external thermal insulation composite system (ETICS) and three curtain wall systems. The accuracy of the procedure is examined using three factors: (1) precision of the measurement, (2) variation of some of the basic parameters of the calculation procedure, and (3) an estimation of the standard error of the calculation. For the ETICS, agreement within <6.0 dB is achieved across much of the frequency range and the trend of the extended dip due to the spring-mass action of the panel is corroborated. The case for using this methodology on curtain wall systems is adequate, however, the trend of calculated results is mostly outside of the 95% confidence limits of the measured results. Possible reasons for this include lack of airtightness of all curtain wall systems and additional transmission due to radiation into and out of the cavity, neither of which are included in the model. The assumption of radiating points or lines, rather than a radiating surface involving the whole panel, gave better agreement at high frequencies for three of the four measured systems (f ≥ 2500 Hz).

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“…Several studies based on sound insulation measurements according to the ISO 10140 [16,26,27], have reported effects of ETICS on parts of the insulation curve between −8 dB and +19 dB. Even in cases where ETICS application results in a net increase of R W , the dip in the insulation curve, which occurs typically at rather low frequencies, can pose a considerable problem when insulation against traffic noise is concerned [28][29][30][31]. The sophisticated numerical prediction model to determine ETICS cladding system transmission loss was introduced based on transfer matrix method [32,33].…”

Section: Introductionmentioning

confidence: 99%

Vibrometry Assessment of the External Thermal Composite Insulation Systems Influence on the Façade Airborne Sound Insulation

Urbán

Roozen

Muellner³

et al. 2018

Applied Sciences

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This paper verifies the impact of the use of an external thermal composite system (ETICS) on airborne sound insulation. For optimum accuracy over a wide frequency range, classical microphone based transmission measurements are combined with accelerometer based vibrometry measurements. Consistency is found between structural resonance frequencies and bending wave velocity dispersion curves determined by vibrometry on the one hand and spectral features of the sound reduction index, the ETICS mass-spring-mass resonance induced dip in the acoustic insulation spectrum, and the coincidence induced dip on the other hand. Scanning vibrometry proves to be an effective tool for structural assessment in the design phase of ETICS systems. The measured spectra are obtained with high resolution in wide frequency range, and yield sound insulation values are not affected by the room acoustic features of the laboratory transmission rooms. The complementarity between the microphone and accelerometer based results allows assessing the effect of ETICS on the sound insulation spectrum in an extended frequency range from 20 Hz to 10 kHz. The modified engineering ∆R prediction model for frequency range up to coincidence frequency of external plaster layer is recommended. Values for the sound reduction index obtained by a modified prediction method are consistent with the measured data.

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Comparison of measured and predicted sound insulation for a thermal retrofitted building

Cited by 8 publications

References 2 publications

A critical review of acoustic modeling and research on building façade

A critical review of acoustic modeling and research on building façade

Whose game? Gender and power in fantasy sports

Vibrometry Assessment of the External Thermal Composite Insulation Systems Influence on the Façade Airborne Sound Insulation

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