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Uncertainty of in situ low frequency reverberation time measurements from 20 Hz: An empirical study
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Operation, Maintenance and Acoustics.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Operation, Maintenance and Acoustics.
Luleå tekniska univesitet.
Number of Authors: 3
2016 (English)In: Noise Control Engineering Journal, ISSN 0736-2501, E-ISSN 2168-8710, Vol. 64, no 6, 706-715 p.Article in journal (Refereed) Published
Abstract [en]

Measuring reverberation time is normally one of the steps within the procedure of determining sound insulation in dwellings where 100 or 50 Hz usually serves as the lower frequency limit. However, even lower frequencies have become a matter of interest as research in the field recently indicated that the range 20-50 Hz seems to be of great importance when it comes to the perception of impact sound in lightweight buildings. A major issue in this context is then whether it is appropriate to measure and evaluate reverberation time at such low frequencies. This paper presents an empirical study of reverberation time measurements made in two rooms using more than 100 microphone positions in each. The measurement uncertainty with respect to microphone position and combinations of positions are compared for the frequency bands from 16 to 1600 Hz. Furthermore, it is analyzed how many microphone positions are needed in order to, with a reasonable probability, end up with an uncertainty in the related standardized impact sound level insulation L′n,T within ±1 dB

Place, publisher, year, edition, pages
2016. Vol. 64, no 6, 706-715 p.
National Category
Fluid Mechanics and Acoustics
Research subject
Engineering Acoustics
Identifiers
URN: urn:nbn:se:ltu:diva-62674DOI: 10.3397/1/376413ISI: 000397386900001ScopusID: 2-s2.0-85014777501OAI: oai:DiVA.org:ltu-62674DiVA: diva2:1084394
Note

Validerad; 2017; Nivå 2; 2017-03-24 (andbra)

Available from: 2017-03-24 Created: 2017-03-24 Last updated: 2017-04-28Bibliographically approved
In thesis
1. Measurement and perception of sound insulation from 20 Hz between dwellings
Open this publication in new window or tab >>Measurement and perception of sound insulation from 20 Hz between dwellings
2017 (English)Doctoral thesis, comprehensive summary (Other academic)
Place, publisher, year, edition, pages
Luleå: Luleå tekniska universitet, 2017
Series
Doctoral thesis / Luleå University of Technology 1 jan 1997 → …, ISSN 1402-1544
National Category
Other Civil Engineering
Research subject
Engineering Acoustics
Identifiers
urn:nbn:se:ltu:diva-62843 (URN)978-91-7583-868-7 (ISBN)978-91-7583-869-4 (ISBN)
Public defence
2017-05-30, F531, Luleå Tekniska Universitet, 971 87 Luleå, 09:30 (English)
Supervisors
Funder
Swedish Research Council Formas
Note

Forskningsfinansiärer:

Sven Tyréns Stiftelse

Formas

Available from: 2017-04-05 Created: 2017-04-03 Last updated: 2017-04-05Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
  • harvard1
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  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
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  • en-US
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  • nn-NO
  • nn-NB
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  • Other locale
More languages
Output format
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