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New single numbers for impact sound 20-5000 Hz based on field measurements and occupants’ surveys
Simmons akustik & utveckling.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Operation, Maintenance and Acoustics.
WSP, Gothenburg.
2013 (English)In: Internoise 2013: Noise Control for Quality of Life, 2013Conference paper (Refereed)
Abstract [en]

Impact sounds at very low frequencies as well as floor vibrations may bother occupants in high riseapartment buildings where floors and walls are supported by timber (or steel) frames. Disturbing impactsounds at medium and high frequency may occur in buildings with conrete floors. A weighted singlenumber should preferably handle both types of sounds such that it is neutral with respect to buildingmaterials. This paper presents a brief overview of some main findings of the Swedish ‘AkuLite’ jointresearch project and discuss two single numbers for impact sound evaluated in the frequency range 20-5000Hz as well as a deflection criterion. These single numbers were based on results from field surveys wherethe occupants have rated the performance of their buildings as well as physical measurements in these. In acompanion paper by Ljunggren et al, the airborne and impact sound single numbers are evaluated by meansof correlation analyses. In listening tests by Thorsson, walking impact sounds were recorded on differenttypes of floor and played back to test subjects by means of paired comparisons. Jarnerö made a survey onfloor vibrations. Their results support the hypothesis, that an extension of the frequency range down to 20Hz as well as introducing a stricter deflection criterion could improve the correlation of physical parametersto occupants’ rating of annoyance from impact sounds.

Place, publisher, year, edition, pages
Research subject
Engineering Acoustics
URN: urn:nbn:se:ltu:diva-37180Local ID: b1da5bbe-d3e2-4114-afd5-2f7c149510c4OAI: diva2:1010678
Godkänd; 2013; 20131216 (andbra)Available from: 2016-10-03 Created: 2016-10-03Bibliographically approved

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