Noise is a growing problem in urban areas. The European Union estimates that some 20 percent of its population suffers from noise levels that scientists and health experts consider unacceptable.
There are different regulations around the world for noise for the transport sector. The current noise emission limit for heavy trucks in most parts of the world including the EU, India and South Korea is 80 decibels (dB).
The Volvo Group is continuously working to measure noise and vibration characteristics in engine and driveline components. Sound engineers use both insulation and alternative design solutions to make everything from engines and transmissions to axles, fans and air intakes quieter.
Next step: trailer and body
At speeds from 50 km/h, it is the vehicle’s tires rather than the driveline that make the most noise. This means that the entire vehicle, including tractor, superstructure, trailer and tires, must be worked on in order to efficiently eliminate noise at all speeds. In an EU project called FIDEUS, a Renault Midlum distribution truck underwent trials in the cities of Lyon and Barcelona, with a particular focus on night deliveries in the latter.