The influence of the traffic characteristics on the indoor noise transmitted by windows is evaluated by means of laboratory measurements into coupled reverberating rooms; different traffic noise spectra are registered and reproduced into the emission room, simulating the outdoor conditions; different windows are installed on the wall between the rooms and the noise spectra into the receiving room, simulating the indoor conditions, are measured and a frequency analysis is carried out. Comparing data obtained by the spectrum proposed by ISO 140 - 3 and the reproduced spectra showed no influence on the Rw value; nevertheless, considering the Ctr corrections such as in UNI EN ISO 717 – 1, significant differences were found. The A weighted levels abatements between emission and receiving room show higher values of Le – Lr for the High Speed Trian spectrum, which is the one with the lower levels at low frequencies; all windows, in fact, have worst acoustics performances at low frequencies.

Windows sound insulation: experimental evaluation of different traffic noise spectra

BURATTI, Cinzia;MORETTI, ELISA;VERGONI, MARCO
2009

Abstract

The influence of the traffic characteristics on the indoor noise transmitted by windows is evaluated by means of laboratory measurements into coupled reverberating rooms; different traffic noise spectra are registered and reproduced into the emission room, simulating the outdoor conditions; different windows are installed on the wall between the rooms and the noise spectra into the receiving room, simulating the indoor conditions, are measured and a frequency analysis is carried out. Comparing data obtained by the spectrum proposed by ISO 140 - 3 and the reproduced spectra showed no influence on the Rw value; nevertheless, considering the Ctr corrections such as in UNI EN ISO 717 – 1, significant differences were found. The A weighted levels abatements between emission and receiving room show higher values of Le – Lr for the High Speed Trian spectrum, which is the one with the lower levels at low frequencies; all windows, in fact, have worst acoustics performances at low frequencies.
9781615676903
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11391/136881
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