Fa莽ade noise abatement prediction: New spectrum adaptation terms measured in field in different road and railway traffic conditions

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• 作者：Cinzia Buratti ; Elisa Belloni ; Elisa Moretti
• 关键词：Road and railway traffic noise ; Noise faç ; ade abatement prediction ; New traffic spectra ; Spectrum adaptation terms
• 刊名：Applied Acoustics
• 出版年：February, 2014
• 年：2014
• 卷：76
• 期：Complete
• 页码：238-248
• 全文大小：2238 K

文摘

The Fa莽ade Acoustic Insulation Index is one of the most disputed parameters for residential and non-residential buildings. The real performance of the fa莽ades does not often agree with the calculated one during the design stage. The field measurement sessions are usually carried out using pink noise spectra, as suggested by the International Standards ISO 717-1. In the present paper six mean spectra derived from in field measurements were proposed: urban toads, traffic lights, roundabouts, freeways, Highways, very high speed trains, high speed trains, and low speed trains. The proposed spectra were equalized against acoustic distortion and were used to measure the noise abatements in a terraced house and in a classroom fa莽ade. The highest abatements result for spectra with high levels at high frequencies, better absorbed than low ones by fa莽ade elements and frames. The spectrum adaptation terms were also calculated both for the standard and the proposed spectra and were used to predict the fa莽ade abatements in compliance with EN ISO 12354-3: the values C_j calculated from the proposed spectra provided more reliable results than the terms C and C_tr (ISO 717-1) and represent a useful tool to predict the noise fa莽ade abatements.