The Use of Sound Absorbing Shading Systems for the Attenuation of Noise on Building Façades. An Experimental Investigation

Buildings

Nicolò Zuccherini Martello¹  Patrizio Fausti¹  Andrea Santoni¹  Simone Secchi² 

[1] Engineering Department, University of Ferrara, via Saragat, 1, I-44122 Ferrara, Italy; E-Mails:;Industrial Engineering Department, University of Florence, via di Santa Marta, 3, I-50139 Florence, Italy; E-Mail:

关键词: building acoustics;    façade sound insulation;    louvers;    external shading devices;   

DOI  :  10.3390/buildings5041346

来源: mdpi

【 摘 要 】

The problem of solar irradiation in building façades with large windows is often solved with the use of external shading devices, such as brise-soleil systems, but their potential acoustic effects on building façades are usually neglected. The purpose of this work is a preliminary consideration of the acoustic behaviour of brise-soleil systems and, furthermore, the evaluation of the possibility to improve their performances, in terms of Sound Pressure Level (SPL) abatement over glass surfaces. The paper reports the results of a study on two portions of the same office building, with shading devices installed in front of large windows. Both airborne sound insulation measurements and SPL measurements over the glass surfaces of the windows were carried out to compare different situations, with or without louvers, and with sound absorbing experimental louvers as well. Results show that the louvers' presence can produce an increase in the SPL over the glass surface as a consequence of the reflection of the sound. Results further show that sound absorbing louvers improve the noise protection of the system, in terms of the SPL reduction, over glass surfaces, cancelling out the negative effect of the standard shading devices.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.