Traffic noise was an installation for the festival paraflows 2006 in Vienna. It is the sonification of webserver communication flow. The webserver becomes an instrument that is excited whenever a person visits the site www.trafficnoise.net. Automatically the visitors creates virtual sound avatars, which obtain their attributes from the surfing behaviour and the IP-Adresse of the visitor. The more often a visitor visits the site, the higher the avatars evolve their sound characteristics.