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Assessment of the sound insulation of a wood joist construction due to different types of impact sources
Luleå tekniska universitet.
Luleå tekniska universitet.
Luleå tekniska universitet.
1996 (English)In: Applied Acoustics, ISSN 0003-682X, E-ISSN 1872-910X, Vol. 48, no 3, p. 195-203Article in journal (Refereed) Published
Abstract [en]

The ISO standard tapping machine was specified as an impact source to assess the sound insulation of floors. The problem is that the noise spectrum produced by the tapping machine does not give similar spectra to that produced by an actual footfall. There are not enough low frequency components in the noise spectrum generated by the tapping machine and it does not, therefore, accurately reflect low frequency noise from the construction being measured. This study presents the impact sound power radiation from a wooden joist construction while applying different impact sources, actual footfall and the standard tapping machine. The sound power radiation obtained from the construction when the tapping machine is applied contains large discrepancies when compared with measurements obtained from an actual footfall at the lower frequency. Comparison of the sound power radiation from the wood joist construction generated by different impact sources showed very good agreement between an actual footfall and a sand ball falling from a certain height. This means that the use of the sand ball drop is a better method of assessing the low frequency impact sound insulation of a construction than using the standard tapping machine.

Place, publisher, year, edition, pages
1996. Vol. 48, no 3, p. 195-203
National Category
Fluid Mechanics and Acoustics
Research subject
Engineering Acoustics
Identifiers
URN: urn:nbn:se:ltu:diva-11356DOI: 10.1016/0003-682X(95)00059-IISI: A1996VG29500002Scopus ID: 2-s2.0-0030197463Local ID: a4dfa800-6fe0-11db-962b-000ea68e967bOAI: oai:DiVA.org:ltu-11356DiVA, id: diva2:984306
Note
Godkänd; 1996; 20060926 (biem)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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