Building acoustics. Estimation of acoustic performance of buildings from the performance of elements. Part 4: Transmission of indoor sound to the outside (ISO 12354-4:2017)
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ISO 12354-4:2017 specifies a calculation model to estimate the sound power level radiated by the envelope of a building due to airborne sound inside that building, primarily by means of measured sound pressure levels inside the building and measured data which characterize the sound transmission by the relevant elements and openings in the building envelope. These sound power levels, together with those of other sound sources in or in front of the building envelope, form the basis for the calculation of the sound pressure level at a chosen distance from a building as a measure for the acoustic performance of buildings. The prediction of the inside sound pressure level from knowledge of the indoor sound sources is outside the scope of this document. The prediction of the outdoor sound propagation is outside the scope of this document. NOTE For simple propagation conditions an approach is given for the estimation of the sound pressure level in Annex E. ISO 12354-4:2017 describes the principles of the calculation model, lists the relevant quantities and defines its applications and restrictions.
Tämän julkaisun valmistelusta Suomessa vastaa Metalliteollisuuden Standardisointiyhdistys ry, puh. 09 19 231 (vaihde).
Sisällysluettelo
Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
3.1 Quantities to express building performance
3.2 Quantities to express element performance
3.3 Other terms and quantities
4 Calculation model
4.1 General principles
4.2 Determination of substitute point sound sources
4.3 Determination of the sound power level for a substitute point source
4.4 Determination of the directivity correction for a substitute point source
4.5 Limitations
5 Accuracy
Annex A List of symbols (normative)
Annex B Interior sound field (informative)
Annex C Sound reduction index (informative)
Annex D Directivity of sound radiation (informative)
Annex E Simplified model to predict exterior sound pressure levels (informative)
Annex F Application of the model to single number ratings (informative)
ISO 10140-1:2016 Acoustics -- Laboratory measurement of sound insulation of building elements -- Part 1: Application rules for specific products
ISO 16283-3:2016 Acoustics -- Field measurement of sound insulation in buildings and of building elements -- Part 3: Façade sound insulation
ISO 7235:2003 Acoustics -- Laboratory measurement procedures for ducted silencers and air-terminal units -- Insertion loss, flow noise and total pressure loss
ISO 10140-1:2016 Acoustics -- Laboratory measurement of sound insulation of building elements -- Part 1: Application rules for specific products
ISO 16283-3:2016 Acoustics -- Field measurement of sound insulation in buildings and of building elements -- Part 3: Façade sound insulation
ISO 7235:2003 Acoustics -- Laboratory measurement procedures for ducted silencers and air-terminal units -- Insertion loss, flow noise and total pressure loss