Abstract

This paper investigates the novel possibility of utilising the structural concrete floor slab as a means of providing additional mid to low frequency sound absorption through the addition of cavities on the ceiling side, formed using flexible formwork, acting as Helmholtz resonators. Mid to low frequency sound absorption in rooms is typically achieved through the use of perforated plasterboard or a suspended tile-in-grid system. Such an approach can separate the room from the thermal mass of the ceiling above, leading to higher peak temperatures or increased cooling load. Suspended ceilings can also increase the embodied energy of the building and limit the potential for stack effect ventilation by reducing room height. In this work, frequency dependent absorption coefficients of perforated concrete samples were measured using an impedance tube test. The results were found to agree with a theoretical analysis, suggesting that it would be relatively easy to predict the performance of perforations of other depths and diameters including those targeted at absorbing higher frequencies.
Original languageEnglish
Pages (from-to)408-420
Number of pages13
JournalBuilding Services Engineering Research and Technology
Volume38
Issue number4
Early online date9 Mar 2017
DOIs
Publication statusPublished - 1 Jul 2017

Fingerprint

Ceilings
Acoustic waves
Concretes
Tile
Concrete construction
Ventilation
Resonators
Cooling
Hot Temperature
Temperature

Cite this

A new route to exposed thermal mass: Sound absorbing poured concrete. / Lombardo, Shaun; Orr, John; Coley, David; Wood, Michael.

In: Building Services Engineering Research and Technology, Vol. 38, No. 4, 01.07.2017, p. 408-420.

Research output: Contribution to journalArticle

@article{77b6cd913afd4f2a8ff4ccb1b632eeb5,
title = "A new route to exposed thermal mass: Sound absorbing poured concrete",
abstract = "This paper investigates the novel possibility of utilising the structural concrete floor slab as a means of providing additional mid to low frequency sound absorption through the addition of cavities on the ceiling side, formed using flexible formwork, acting as Helmholtz resonators. Mid to low frequency sound absorption in rooms is typically achieved through the use of perforated plasterboard or a suspended tile-in-grid system. Such an approach can separate the room from the thermal mass of the ceiling above, leading to higher peak temperatures or increased cooling load. Suspended ceilings can also increase the embodied energy of the building and limit the potential for stack effect ventilation by reducing room height. In this work, frequency dependent absorption coefficients of perforated concrete samples were measured using an impedance tube test. The results were found to agree with a theoretical analysis, suggesting that it would be relatively easy to predict the performance of perforations of other depths and diameters including those targeted at absorbing higher frequencies.",
author = "Shaun Lombardo and John Orr and David Coley and Michael Wood",
year = "2017",
month = "7",
day = "1",
doi = "10.1177/0143624417698833",
language = "English",
volume = "38",
pages = "408--420",
journal = "Building Services Engineering Research and Technology",
issn = "0143-6244",
publisher = "Sage Publications",
number = "4",

}

TY - JOUR

T1 - A new route to exposed thermal mass: Sound absorbing poured concrete

AU - Lombardo, Shaun

AU - Orr, John

AU - Coley, David

AU - Wood, Michael

PY - 2017/7/1

Y1 - 2017/7/1

N2 - This paper investigates the novel possibility of utilising the structural concrete floor slab as a means of providing additional mid to low frequency sound absorption through the addition of cavities on the ceiling side, formed using flexible formwork, acting as Helmholtz resonators. Mid to low frequency sound absorption in rooms is typically achieved through the use of perforated plasterboard or a suspended tile-in-grid system. Such an approach can separate the room from the thermal mass of the ceiling above, leading to higher peak temperatures or increased cooling load. Suspended ceilings can also increase the embodied energy of the building and limit the potential for stack effect ventilation by reducing room height. In this work, frequency dependent absorption coefficients of perforated concrete samples were measured using an impedance tube test. The results were found to agree with a theoretical analysis, suggesting that it would be relatively easy to predict the performance of perforations of other depths and diameters including those targeted at absorbing higher frequencies.

AB - This paper investigates the novel possibility of utilising the structural concrete floor slab as a means of providing additional mid to low frequency sound absorption through the addition of cavities on the ceiling side, formed using flexible formwork, acting as Helmholtz resonators. Mid to low frequency sound absorption in rooms is typically achieved through the use of perforated plasterboard or a suspended tile-in-grid system. Such an approach can separate the room from the thermal mass of the ceiling above, leading to higher peak temperatures or increased cooling load. Suspended ceilings can also increase the embodied energy of the building and limit the potential for stack effect ventilation by reducing room height. In this work, frequency dependent absorption coefficients of perforated concrete samples were measured using an impedance tube test. The results were found to agree with a theoretical analysis, suggesting that it would be relatively easy to predict the performance of perforations of other depths and diameters including those targeted at absorbing higher frequencies.

UR - http://dx.doi.org/10.1177/0143624417698833

U2 - 10.1177/0143624417698833

DO - 10.1177/0143624417698833

M3 - Article

VL - 38

SP - 408

EP - 420

JO - Building Services Engineering Research and Technology

JF - Building Services Engineering Research and Technology

SN - 0143-6244

IS - 4

ER -