Block surfaces, made of stones or cement concrete, have a widespread use in today's cities and towns. However, there are many examples where the use of block surfaces has led to complaints from people living or working close to streets with such pavements; complaints that mostly focus on the extra noise generated by the traffic on such surfaces. The EU-project SILENCE has recognized this sensitive balance and therefore included a subtask with the title “Noise reduction for paving stone surfaces for streets of high cultural or historic importance”. The objectives are stated as: