Building acoustics. Estimation of acoustic performance of buildings from the performance of elements - Transmission of indoor sound to the outside1 Scope This document 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

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the description of performance and test methods may need to be suitably adapted

guidance to manufacturers on procedures for routine testing and conditions for electrical test methods

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