Impact sound insulation of floor systems with hollow brick slabs

Souza, Camila Fernandes Natus de; Pacheco, Fernanda; Oliveira, Maria Fernanda de; Heissler, Rafael Ferreira; Tutikian, Bernardo Fonseca

doi:10.1016/j.cscm.2020.e00387

Cited by 2 publications

(3 citation statements)

References 17 publications

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“…Assim como a ressonância nas baixas frequências, a coincidência representa perdas no isolamento acústico que podem ser reduzidas com a adoção de elementos que garantam o amortecimento do sistema, para limitar as amplitudes de vibração e minimizar a queda do isolamento pela coincidência. (6,7) Em sistemas construtivos executados com vigotas de concreto e lajotas cerâmicas a radiação acústica é elevada e ocorre nas bandas de altas frequências, provocada pelas cavidades de ar principalmente devido a ressonâncias de cavidades de elementos vazados, conforme concluído em estudos anteriores (8)(9)(10)(11).…”

Section: Introductionunclassified

Desempenho acústico de lajes não homogêneas

Oliveira

Heissler²,

Walter³

et al. 2022

Xix Encontro Nacional De Tecnologia Do Ambiente Construído

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Neste trabalho são apresentadas as características de isolamento acústico para os sons aéreos e de impacto de três tipos de lajes, sendo lajes nervuradas de duas espessuras, tipo vigota e lajota de duas espessuras e uma laje de concreto maciço de 12cm de espessura. Foram realizados ensaios em laboratório conforme ISO 10140. Resultados: a) elementos vazados reduzem o isolamento ao som aéreo e alteram a composição espectral do som medido; b) o aumento em 2cm na altura das lajes vigota/lajota não altera o Rw; e c) nas lajes nervuradas o aumento de 10cm na altura das vigas não influencia nos valores de Ln,w.

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Section: Introductionunclassified

Desempenho acústico de lajes não homogêneas

Oliveira

Heissler²,

Walter³

et al. 2022

Xix Encontro Nacional De Tecnologia Do Ambiente Construído

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show abstract

“…Even though floating floors represent a key method for reducing impact noise, suspended ceilings or structural discontinuities can be utilized to improve the impact sound insulation performance [12,13]. A few studies examined the impact sound insulation performance of suspended ceilings at the bottom parts of floor structures [14][15][16][17][18][19][20][21]. In these studies, the effects of the suspended ceilings on the impact sound insulation performance varied depending on the experimental conditions.…”

Section: Introductionmentioning

confidence: 99%

“…Some studies investigated the effects of the ceiling on the lightweight impact sound produced by the tapping machine. Souza et al [18] studied some cases of impact sound pressure levels for one-way rib and hollow brick slabs using gypsum ceilings with air cavities (150 mm) and resilient layers (thickness equal to 10 mm). The results showed that the weighted values (L n,Aw ) for standard tapping machines were decreased from 13 dB to 16 dB by installing the gypsum ceiling.…”

Section: Introductionmentioning

confidence: 99%

Effects of Wall-to-Wall Supported Ceilings on Impact Sound Insulation for Use in Residential Buildings

2021

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In Korean residential buildings, floor impact sounds were reduced over the past few decades mainly through a floating floor system. However, ceiling constructions for impact sound reduction have not been applied actively because of a lack of useful information. This study focuses on the effects of wall-to-wall supported ceilings (WSC), which are designed with construction discontinuities between concrete slabs and ceilings, and the damping caused by porous absorbers for impact sound insulation. To examine the impact sound insulation according to ceiling conditions, measurements were performed in 25 floor–ceiling assemblies. The results indicate that ceiling treatment is mostly useful in reducing the floor impact sound. The floor impact sound owing to the WSC decreased by 2–7 dB and 2–8 dB in terms of the single number quantity for the tapping machine and rubber balls, respectively, compared with representative existing housing constructions wherein ceilings were attached on wooden sticks. Furthermore, the reduction effect of the WSC appeared to be more profound when it was applied to the floor–ceiling assembly with poor impact sound insulation. Thus, the WSC can be used to enhance the impact of sound insulation of existing housings without major repairs of floor structural layers.

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Impact sound insulation of floor systems with hollow brick slabs

Cited by 2 publications

References 17 publications

Desempenho acústico de lajes não homogêneas

Desempenho acústico de lajes não homogêneas

Effects of Wall-to-Wall Supported Ceilings on Impact Sound Insulation for Use in Residential Buildings

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