BS EN ISO 12354-3:2017规定了估算隔声或声压的计算模型 建筑立面或其他外表面的水平差。计算是基于声音 建筑立面的不同元素的缩减指数，包括直接 和侧翼传输。计算得出的结果与计算结果大致相符 根据ISO 16283-3进行现场测量。可以对频率进行计算 乐队或单数收视率。计算结果也可用于计算室内声压级 道路交通实例（见附件E）。本文件描述了计算模型的原理，列出了相关数量和 定义其应用程序和限制。交叉引用:ISO 12354-1:2017ISO 717-1:2013 ED3ISO 10140-1:2016EN 12758- 1标准B 8115ISO 10140-2:2010ISO 16283-3:2016DIN 4109:1989（E）ISO 11654:1997（R08）购买本文件时可获得的所有现行修订均包括在购买本文件中。

BS EN ISO 12354-3:2017 specifies a calculation model to estimate the sound insulation or the sound pressure level difference of a facade or other external surface of a building. The calculation is based on the sound reduction index of the different elements from which the facade is constructed and it includes direct and flanking transmission. The calculation gives results which correspond approximately to the results from field measurements in accordance with ISO 16283-3. Calculations can be carried out for frequency bands or for single number ratings.The calculation results can also be used for calculating the indoor sound pressure level due to for instance road traffic (see Annex E).This document describes the principles of the calculation model, lists the relevant quantities and defines its applications and restrictions.Cross References:ISO 12354-1:2017ISO 717-1:2013 ED3ISO 10140-1:2016EN 12758-1ONORM B 8115ISO 10140-2:2010ISO 16283-3:2016DIN 4109:1989 (E)ISO 11654:1997 (R08)All current amendments available at time of purchase are included with the purchase of this document.