Acoustic properties of green walls: Absorption and insulation

Thomazelli, Rodolfo; Caetano, Fernando Durso Neves; Bertoli, Stelamaris Rolla

doi:10.1121/2.0000426

Cited by 9 publications

(14 citation statements)

References 7 publications

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“…The absorption coefficient of each surface is multiplied by its area, and are summed to obtain A0, which excludes the living wall. The obtained values for the absorption coefficient of the wall are comparable to those found by Thomazelli et al [18] in their experimentation for frequencies of 125 Hz and 1000 Hz. However, the absorption coefficient at 250 and 500 Hz demonstrated a higher calculated value.…”

Section: Calculating the Absorption Coefficient Of The Living Wallsupporting

confidence: 89%

“…Figure 15: Comparing the calculated absorption coefficient of the living wall from the measurements done at location 1, with that found in the literature review from Thomazelli et al [18] Hence, the absorption coefficient of the living wall could be deduced as in Table 8, and these values are further used in this research in the acoustic simulation and modelling. The deduction is calibrated with the values from Thomazelli et al, eliminating the possible errors that might have resulted in the measurements made, and therefore aligning the values.…”

Section: Calculating the Absorption Coefficient Of The Living Wallmentioning

confidence: 70%

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The Application Of Living Walls For Acoustic Comfort

Bahour¹

2021

Preprint

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Interior space comfort encompasses design performance criteria beyond the thermal qualities of the space. The acoustic performance has shown to be an essential factor for the productivity levels of the users of the space, and is essential for overall indoor environment quality to be maintained. This research focuses on the potential of integrating living walls within indoor spaces, such as atriums and halls, to provide a passive strategy for noise insulation. The procedure is conducted through a series of acoustic measurements and calculations to determine the sound absorption coefficient of living walls in-situ. A case study space is used to evaluate the integration of living walls to provide acoustic comfort.

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Section: Calculating the Absorption Coefficient Of The Living Wallsupporting

confidence: 89%

Section: Calculating the Absorption Coefficient Of The Living Wallmentioning

confidence: 70%

The Application Of Living Walls For Acoustic Comfort

Bahour¹

2021

Preprint

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“…Queda en evidencia que el buen comportamiento absorbente acústico de los módulos de soporte hace despreciable el comportamiento fonoabsorbente de la vegetación utilizada en los mismos. Esto representa una Panel Medido Ref [1] Ref [2] Hormigón Pintado ventaja frente a otros sistemas en donde la absorción depende de la vegetación, y por lo tanto de su desarrollo y grado de cobertura [1]. El sistema posee una buena absorción acústica, especialmente en el rango de frecuencias altas, debido a la textura del fieltro empleado para la confección de los bolsillos soporte y al recubrimiento utilizado en los paneles de PVC espumado.…”

Section: Conclusionesunclassified

Absorción Acústica de Jardines Verticales

Velis¹,

Posse

Malfa

2019

Elek.

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Los jardines verticales forman parte de una de las tendencias tecnológicas constructivas más modernas, conocidas como “Greenery Systems”. Estas son aplicadas cada vez con más frecuencia en aquellas construcciones donde se priorizan consideraciones energéticas y ecológicas conciliables con el medio ambiente. Algunas de las características relevantes que presentan son la mejora del aislamiento térmico, el filtrado de polución ambiental, la absorción acústica, la retención de agua y una estética amigable. Los jardines verticales pueden poseer características acústicas disímiles entre ellos, debido a que dependen del tipo de soporte, sustrato y vegetación utilizada. Por ese motivo en la actualidad los datos existentes son muy variados e incompletos, y resulta necesario ampliar los mismos para disponer de mayores variantes constructivas con aplicación práctica. En este trabajo se estudió la absorción acústica de un sistema de jardín vertical del tipo modular. Cada módulo fue realizado sobre una base rígida de PVC, revestida de material fibroso, con el cual se conformaron bolsillos. En ellos se alojó el sustrato y la vegetación. Las especies vegetales que se utilizaron son algunas de las más difundidas en la región, a fin de lograr una buena adaptación y un mantenimiento sencillo.

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“…Environmental degradation in cities leads public authorities to think about new ecological and sustainable solutions. Among them, the green walls and roofs highlighted their contribution in terms of thermal insulation [1,2,3,4,5], energy eciency [6,7] and acoustics insulation [8,9,10], green walls and green roof structures become more and more attractive.…”

Section: Introductionmentioning

confidence: 99%

“…Most of the related studies having been carried out were about in situ characterizations of the sound reduction index [6,8,14,30]. Our research objectives are dierent and based on a theoretical model enabled to optimize a green wall structure to improve the return and transmission losses.…”

Section: Introductionmentioning

confidence: 99%

An optimal dimensioning method of a green wall structure for noise pollution reduction

Attal

Dubus²,

Leblois

et al. 2021

Building and Environment

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This paper concern the optimization of a multilayered green wall structure including substrate and foliage in order to reduce as much as possible backward noise reection and forward transmission from the wall. Each component involved in the wall structure is fully characterized experimentally to get its tranfer matrix. Simulation demonstrated that foliage layer superimposed to substrate layer doesn't aect the transmission losses but contributes greatly to the increase of return losses of the green wall structure.To acheive the best performances in terms of return and forward losses as well as frequency bandwidth, the methods of optimization are discussed including selection of types of materials, thicknesses, arrangement of layers as parameters.

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Acoustic properties of green walls: Absorption and insulation

Cited by 9 publications

References 7 publications

The Application Of Living Walls For Acoustic Comfort

The Application Of Living Walls For Acoustic Comfort

Absorción Acústica de Jardines Verticales

An optimal dimensioning method of a green wall structure for noise pollution reduction

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