Quantifying noise exposure will be significantly easier thanks to a new set of common noise assessment methods published today. Comparable data on noise exposure in Europe is a prerequisite to set up EU policies to reduce noise pollution, a growing health and economic concern all over Europe. The new methods – known as Common Noise Assessment Methods in Europe (CNOSSOS-EU) – were drawn up by the European Commission’s in-house science service, the Joint Research Centre. They assess noise from road, rail and air traffic and from industry, and will provide consistent and comparable data on the noise levels to which people are exposed. Member States will have to start using the new methods for the next round of EU-wide strategic noise mapping in 2017.