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Justification of standardized level differences in rating of airborne sound insulation between dwellings

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Justification of standardized level differences in rating of airborne sound insulation between dwellings. / Kylliäinen, Mikko; Takala, Joose; Oliva, David; Hongisto, Valtteri.

In: Applied Acoustics, Vol. 102, 2016, p. 12-18.

Research output: Contribution to journalArticleScientificpeer-review

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Kylliäinen, Mikko ; Takala, Joose ; Oliva, David ; Hongisto, Valtteri. / Justification of standardized level differences in rating of airborne sound insulation between dwellings. In: Applied Acoustics. 2016 ; Vol. 102. pp. 12-18.

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@article{d1607cce25294a829bd8c420b57b54e0,
title = "Justification of standardized level differences in rating of airborne sound insulation between dwellings",
abstract = "It has long been recognized that single-number quantities R'(W), D-nT,D-W or D-n,D-w result in different conclusions in objective rating of airborne sound insulation between dwellings. The difference between the values of these single-number quantities (SNQ), however, does not prove which of them describes the sound transmission between rooms most correctly. The main object of this article was to study which SNQ correspond best with transmitted living sound levels in buildings when reverberation time, volume of receiving room and sound insulation are taken into account. Data of 100 field measurements of airborne sound insulation were collected as well as 207 reverberation times of furnished rooms. The transmitted sound levels of living sounds were evaluated on the basis of known living sound spectra and measured level differences D. The results show that the SNQs standardized to reference reverberation time of 0.5 s lead in all cases to best correlation between the SNQs and the sound levels of transmitted living sounds. It was also checked whether the rating by D-nT,D-W would lead to higher transmitted sound levels of living sounds in larger rooms, but this was not detected. The use of D-nT,D-W makes rooms of different volumes equal in regard to required sound insulation between them. It is thus justified to replace R'(w) with D-nT,D-W as the SNQ for rating the airborne sound insulation. Widening the frequency range down to 50 Hz or up to 5000 Hz did not give noteworthy improvement in the correlation. (C) 2015 Elsevier Ltd. All rights reserved.",
keywords = "Absorption area, Airborne sound insulation, Building acoustics, Reverberation time",
author = "Mikko Kylli{\"a}inen and Joose Takala and David Oliva and Valtteri Hongisto",
year = "2016",
doi = "10.1016/j.apacoust.2015.08.007",
language = "English",
volume = "102",
pages = "12--18",
journal = "Applied Acoustics",
issn = "0003-682X",
publisher = "Elsevier",

}

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TY - JOUR

T1 - Justification of standardized level differences in rating of airborne sound insulation between dwellings

AU - Kylliäinen, Mikko

AU - Takala, Joose

AU - Oliva, David

AU - Hongisto, Valtteri

PY - 2016

Y1 - 2016

N2 - It has long been recognized that single-number quantities R'(W), D-nT,D-W or D-n,D-w result in different conclusions in objective rating of airborne sound insulation between dwellings. The difference between the values of these single-number quantities (SNQ), however, does not prove which of them describes the sound transmission between rooms most correctly. The main object of this article was to study which SNQ correspond best with transmitted living sound levels in buildings when reverberation time, volume of receiving room and sound insulation are taken into account. Data of 100 field measurements of airborne sound insulation were collected as well as 207 reverberation times of furnished rooms. The transmitted sound levels of living sounds were evaluated on the basis of known living sound spectra and measured level differences D. The results show that the SNQs standardized to reference reverberation time of 0.5 s lead in all cases to best correlation between the SNQs and the sound levels of transmitted living sounds. It was also checked whether the rating by D-nT,D-W would lead to higher transmitted sound levels of living sounds in larger rooms, but this was not detected. The use of D-nT,D-W makes rooms of different volumes equal in regard to required sound insulation between them. It is thus justified to replace R'(w) with D-nT,D-W as the SNQ for rating the airborne sound insulation. Widening the frequency range down to 50 Hz or up to 5000 Hz did not give noteworthy improvement in the correlation. (C) 2015 Elsevier Ltd. All rights reserved.

AB - It has long been recognized that single-number quantities R'(W), D-nT,D-W or D-n,D-w result in different conclusions in objective rating of airborne sound insulation between dwellings. The difference between the values of these single-number quantities (SNQ), however, does not prove which of them describes the sound transmission between rooms most correctly. The main object of this article was to study which SNQ correspond best with transmitted living sound levels in buildings when reverberation time, volume of receiving room and sound insulation are taken into account. Data of 100 field measurements of airborne sound insulation were collected as well as 207 reverberation times of furnished rooms. The transmitted sound levels of living sounds were evaluated on the basis of known living sound spectra and measured level differences D. The results show that the SNQs standardized to reference reverberation time of 0.5 s lead in all cases to best correlation between the SNQs and the sound levels of transmitted living sounds. It was also checked whether the rating by D-nT,D-W would lead to higher transmitted sound levels of living sounds in larger rooms, but this was not detected. The use of D-nT,D-W makes rooms of different volumes equal in regard to required sound insulation between them. It is thus justified to replace R'(w) with D-nT,D-W as the SNQ for rating the airborne sound insulation. Widening the frequency range down to 50 Hz or up to 5000 Hz did not give noteworthy improvement in the correlation. (C) 2015 Elsevier Ltd. All rights reserved.

KW - Absorption area

KW - Airborne sound insulation

KW - Building acoustics

KW - Reverberation time

U2 - 10.1016/j.apacoust.2015.08.007

DO - 10.1016/j.apacoust.2015.08.007

M3 - Article

VL - 102

SP - 12

EP - 18

JO - Applied Acoustics

JF - Applied Acoustics

SN - 0003-682X

ER -