## Railroad noise measurements from the Stavanger-Sandnes double track project:

Enno Swets

Seksjonsleder akustikk

Dir: +47 67 57 12 91 | Mob: +47 45 40 12 91

enno.swets@norconsult.com

The old type short distance electrical passenger trains in Norway (type Bm69), built in the 70’s and 80’s by Norwegian Strømmens Værkssted are gradually exchanged by modern trains (type Bm72), produced by Italian Ansaldobreda. On paper the noise levels produced by the new Bm72 are 3-6dB lower than the Bm69, depending on track conditions and maintenance. One should therefore expect the number of noise complaints to be falling as a result of the use of new trains. However there are some suggestions that this is not the case. Noise complaints seem to be concentrated around station areas and other areas with frequent braking / acceleration. This paper takes a look at some of the possible causes of the complaints.