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首页> 外文会议>International Congress on Acoustics >Prediction of maximum Fast time-weighted sound pressure levels from time-varying structure-borne sound sources in heavyweight buildings
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Prediction of maximum Fast time-weighted sound pressure levels from time-varying structure-borne sound sources in heavyweight buildings

机译：重量夸大建筑中时变结构声源的最大快速时间加权声压水平的预测

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At present the prediction model in EN 12354-5 for sound transmission due to structure-borne excitation from building machinery is limited to sources running under steady-state conditions. As machinery noise also needs to be assessed under time-varying conditions, building regulations on installation noise in some European countries set requirements based on the maximum Fast time-weighted sound pressure level in the receiving room. This paper proposes an approach that could predict this information at the design stage and validates it using idealised time-varying signals applied via a shaker into a concrete floor. A heavyweight reception plate is used to quantify the structure-borne sound power using equivalent continuous levels over 125ms time periods from which the highest value can be used as the power input into an SEA or SEA-based prediction model. An empirical correction (developed in previous work by the authors) is then applied to the output from this model to estimate the maximum Fast time-weighted sound pressure level. This approach is validated with measurements in a room below a concrete floor (where there is suppressed flanking transmission) from which the results show close agreement between predictions and measurements for one-third octave bands and A-weighted values.
机译：目前，由于建筑机械的结构型激发，EN 12354-5 EN 12354-5的预测模型仅限于在稳态条件下运行的源。由于机械噪声也需要在时变条件下进行评估，因此在一些欧洲国家的安装噪声建立规定，根据接收室的最大快速时间加权声压水平设定了要求。本文提出了一种方法，可以在设计阶段预测该信息，并使用通过振动器施加到混凝土地板的理想化时变信号。重量级接收板用于使用相同的连续水平量化的结构传播音量超过125ms的时间段，最高值可以用作大海或海洋预测模型的电力输入。然后将实证更正（在作者之前的工作中开发）应用于该模型的输出以估计最大快速时间加权声压水平。这种方法通过测量在混凝土地板下方（其中存在抑制侧翼传输）的房间中进行验证，结果显示了三分之一八个频带和加权值的预测和测量之间的密切一致。

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